entityMap|blocks|key|810ne|text|function+searchForId($id,+$array)+{
+++foreach+($array+as+$key+=>+$val)+{
+++++++if+($val['uid']+===+$id)+{
+++++++++++return+$key;
+++++++}
+++}
+++return+null;
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|5eba6|这将会起作用。你应该这样称呼它：|unstyled|1vo3o|$id+=+searchForId('100',+$userdb);|jb3g|重要的是要知道，如果您正在使用|c6911|运算符比较的类型必须完全相同，在此示例中，您必须搜索|f1oo1|或者只是使用|4rlnl|取而代之的是|6s2pq|..。|dvr0o|基于|18cid|角度|c8ts6|回答。在PHP的更高版本中(|b47gg|)您可以使用一行程序。|dfclr|$key+=+array_search('100',+array_column($userdb,+'uid'));|aq4dr|以下是文档：|dj952|http://php.net/manual/en/function.array-column.php|5gkge^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|18|9|@]|A|@]|B|$C|D]]|$2|E|4|F|6|G|8|19|9|@]|A|@]|B|$]]|$2|H|4|I|6|7|8|1A|9|@]|A|@]|B|$C|D]]|$2|J|4|K|6|G|8|1B|9|@]|A|@]|B|$]]|$2|L|4|M|6|G|8|1C|9|@]|A|@]|B|$]]|$2|N|4|O|6|G|8|1D|9|@]|A|@]|B|$]]|$2|P|4|Q|6|G|8|1E|9|@]|A|@]|B|$]]|$2|R|4|S|6|G|8|1F|9|@]|A|@]|B|$]]|$2|T|4|U|6|G|8|1G|9|@]|A|@]|B|$]]|$2|V|4|W|6|G|8|1H|9|@]|A|@]|B|$]]|$2|X|4|Y|6|G|8|1I|9|@]|A|@]|B|$]]|$2|Z|4|10|6|G|8|1J|9|@]|A|@]|B|$]]|$2|11|4|12|6|7|8|1K|9|@]|A|@]|B|$C|D]]|$2|13|4|14|6|G|8|1L|9|@]|A|@]|B|$]]|$2|15|4|16|6|G|8|1M|9|@]|A|@]|B|$]]|$2|17|4|S|6|G|8|1N|9|@]|A|@]|B|$]]]]

<pre><code>function searchForId($id, $array) {
 foreach ($array as $key =&gt; $val) {
 if ($val['uid'] === $id) {
 return $key;
 }
 }
 return null;
}
</code></pre>

This will work. You should call it like this:

<pre><code>$id = searchForId('100', $userdb);
</code></pre>

It is important to know that if you are using <code>===</code> operator compared types have to be exactly same, in this example you have to search <code>string</code> or just use <code>==</code> instead <code>===</code>.

Based on <a href="https://stackoverflow.com/a/24527099/819364">angoru</a> answer. In later versions of PHP (<code>&gt;= 5.5.0</code>) you can use one-liner.

<pre><code>$key = array_search('100', array_column($userdb, 'uid'));
</code></pre>

Here is documentation: <a href="http://php.net/manual/en/function.array-column.php" rel="noreferrer">http://php.net/manual/en/function.array-column.php</a>.

entityMap|blocks|key|3ra5a|text|我知道这个问题已经得到了回答，但我在代码中使用了这一点，并对其进行了更多扩展，这样您就不会只通过uid进行搜索。我只想把它分享给其他可能需要该功能的人。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|di5rj|这是我的例子，请记住这是我的第一个答案。我去掉了param数组，因为我只需要搜索一个特定的数组，但是您可以很容易地将它添加进去。我想从本质上说不仅仅是通过uid进行搜索。|7v0eg|此外，在我的情况下，可能会有多个键作为其他字段搜索的结果返回，这些字段可能不是唯一的。|aps3l|/**
+++++*+@param+array+multidimensional+
+++++*+@param+string+value+to+search+for,+ie+a+specific+field+name+like+name_first
+++++*+@param+string+associative+key+to+find+it+in,+ie+field_name
+++++*+
+++++*+@return+array+keys.
+++++*/
+++++function+search_revisions($dataArray,+$search_value,+$key_to_search)+{
++++++++//+This+function+will+search+the+revisions+for+a+certain+value
++++++++//+related+to+the+associative+key+you+are+looking+for.
++++++++$keys+=+array();
++++++++foreach+($dataArray+as+$key+=>+$cur_value)+{
++++++++++++if+($cur_value[$key_to_search]+==+$search_value)+{
++++++++++++++++$keys[]+=+$key;
++++++++++++}
++++++++}
++++++++return+$keys;
++++}|code-block|syntax|javascript|dol43|后来，我最终编写了这段代码，以允许我搜索另一个值和关联键。因此，我的第一个示例允许您在任何特定的关联键中搜索值，并返回所有匹配项。|3d5n3|第二个示例向您展示了在某个关联关键字(第一个)中找到值('Taylor')的位置|2rj3|_|871pv|名称)|6tpie|和|qr5v|在另一个关联关键字(employed)中找到另一个值(true)，并返回所有匹配的关键字(名字为'Taylor‘和employed的关键字)。|fqrcu|/**
+*+@param+array+multidimensional+
+*+@param+string+$search_value+The+value+to+search+for,+ie+a+specific+'Taylor'
+*+@param+string+$key_to_search+The+associative+key+to+find+it+in,+ie+first_name
+*+@param+string+$other_matching_key+The+associative+key+to+find+in+the+matches+for+employed
+*+@param+string+$other_matching_value+The+value+to+find+in+that+matching+associative+key,+ie+true
+*+
+*+@return+array+keys,+ie+all+the+people+with+the+first+name+'Taylor'+that+are+employed.
+*/
+function+search_revisions($dataArray,+$search_value,+$key_to_search,+$other_matching_value+=+null,+$other_matching_key+=+null)+{
++++//+This+function+will+search+the+revisions+for+a+certain+value
++++//+related+to+the+associative+key+you+are+looking+for.
++++$keys+=+array();
++++foreach+($dataArray+as+$key+=>+$cur_value)+{
++++++++if+($cur_value[$key_to_search]+==+$search_value)+{
++++++++++++if+(isset($other_matching_key)+&&+isset($other_matching_value))+{
++++++++++++++++if+($cur_value[$other_matching_key]+==+$other_matching_value)+{
++++++++++++++++++++$keys[]+=+$key;
++++++++++++++++}
++++++++++++}+else+{
++++++++++++++++//+I+must+keep+in+mind+that+some+searches+may+have+multiple
++++++++++++++++//+matches+and+others+would+not,+so+leave+it+open+with+no+continues.
++++++++++++++++$keys[]+=+$key;
++++++++++++}
++++++++}
++++}
++++return+$keys;
}|da02u|函数的使用|dqng4|$data+=+array(
++++array(
++++++++'cust_group'+=>+6,
++++++++'price'+=>+13.21,
++++++++'price_qty'+=>+5
++++),
++++array(
++++++++'cust_group'+=>+8,
++++++++'price'+=>+15.25,
++++++++'price_qty'+=>+4
++++),
++++array(
++++++++'cust_group'+=>+8,
++++++++'price'+=>+12.75,
++++++++'price_qty'+=>+10
++++)
);

$findKey+=+search_revisions($data,'8',+'cust_group',+'10',+'price_qty');
print_r($findKey);|2d289|结果|2iscb|Array+(+[0]+=>+2+)^0|0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|17|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|18|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|19|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|1A|9|@]|A|@]|B|$J|K]]|$2|L|4|M|6|7|8|1B|9|@]|A|@]|B|$]]|$2|N|4|O|6|7|8|1C|9|@]|A|@]|B|$]]|$2|P|4|Q|6|7|8|1D|9|@]|A|@]|B|$]]|$2|R|4|S|6|7|8|1E|9|@]|A|@]|B|$]]|$2|T|4|U|6|7|8|1F|9|@]|A|@]|B|$]]|$2|V|4|W|6|7|8|1G|9|@]|A|@]|B|$]]|$2|X|4|Y|6|I|8|1H|9|@]|A|@]|B|$J|K]]|$2|Z|4|10|6|7|8|1I|9|@]|A|@]|B|$]]|$2|11|4|12|6|I|8|1J|9|@]|A|@]|B|$J|K]]|$2|13|4|14|6|7|8|1K|9|@]|A|@]|B|$]]|$2|15|4|16|6|I|8|1L|9|@]|A|@]|B|$J|K]]]]

I know this was already answered, but I used this and extended it a little more in my code so that you didn't have search by only the uid. I just want to share it for anyone else who may need that functionality.

Here's my example and please bare in mind this is my first answer. I took out the param array because I only needed to search one specific array, but you could easily add it in. I wanted to essentially search by more than just the uid.

Also, in my situation there may be multiple keys to return as a result of searching by other fields that may not be unique.

<pre><code> /**
 * @param array multidimensional 
 * @param string value to search for, ie a specific field name like name_first
 * @param string associative key to find it in, ie field_name
 * 
 * @return array keys.
 */
 function search_revisions($dataArray, $search_value, $key_to_search) {
 // This function will search the revisions for a certain value
 // related to the associative key you are looking for.
 $keys = array();
 foreach ($dataArray as $key =&gt; $cur_value) {
 if ($cur_value[$key_to_search] == $search_value) {
 $keys[] = $key;
 }
 }
 return $keys;
 }
</code></pre>

Later, I ended up writing this to allow me to search for another value and associative key. So my first example allows you to search for a value in any specific associative key, and return all the matches. 

This second example shows you where a value ('Taylor') is found in a certain associative key (first_name) AND another value (true) is found in another associative key (employed), and returns all matches (Keys where people with first name 'Taylor' AND are employed).

<pre><code>/**
 * @param array multidimensional 
 * @param string $search_value The value to search for, ie a specific 'Taylor'
 * @param string $key_to_search The associative key to find it in, ie first_name
 * @param string $other_matching_key The associative key to find in the matches for employed
 * @param string $other_matching_value The value to find in that matching associative key, ie true
 * 
 * @return array keys, ie all the people with the first name 'Taylor' that are employed.
 */
 function search_revisions($dataArray, $search_value, $key_to_search, $other_matching_value = null, $other_matching_key = null) {
 // This function will search the revisions for a certain value
 // related to the associative key you are looking for.
 $keys = array();
 foreach ($dataArray as $key =&gt; $cur_value) {
 if ($cur_value[$key_to_search] == $search_value) {
 if (isset($other_matching_key) &amp;&amp; isset($other_matching_value)) {
 if ($cur_value[$other_matching_key] == $other_matching_value) {
 $keys[] = $key;
 }
 } else {
 // I must keep in mind that some searches may have multiple
 // matches and others would not, so leave it open with no continues.
 $keys[] = $key;
 }
 }
 }
 return $keys;
}
</code></pre>

Use of function 

<pre><code>$data = array(
 array(
 'cust_group' =&gt; 6,
 'price' =&gt; 13.21,
 'price_qty' =&gt; 5
 ),
 array(
 'cust_group' =&gt; 8,
 'price' =&gt; 15.25,
 'price_qty' =&gt; 4
 ),
 array(
 'cust_group' =&gt; 8,
 'price' =&gt; 12.75,
 'price_qty' =&gt; 10
 )
);

$findKey = search_revisions($data,'8', 'cust_group', '10', 'price_qty');
print_r($findKey);
</code></pre>

Result 

<pre><code>Array ( [0] =&gt; 2 ) 
</code></pre>

entityMap|blocks|key|a1hlt|text|在Jakub的基础上构建|type|unstyled|depth|inlineStyleRanges|entityRanges|data|fqnlg|很好的答案|5l51m|，这是一个更通用的搜索，它允许指定关键字(不仅仅是uid)：|7a1rm|function+searcharray($value,+$key,+$array)+{
+++foreach+($array+as+$k+=>+$val)+{
+++++++if+($val[$key]+==+$value)+{
+++++++++++return+$k;
+++++++}
+++}
+++return+null;
}|code-block|syntax|javascript|f87c8|用法：^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|N|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|O|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|P|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|Q|9|@]|A|@]|B|$J|K]]|$2|L|4|M|6|7|8|R|9|@]|A|@]|B|$]]]]

Building off Jakub's <a href="https://stackoverflow.com/a/6661561/310394">excellent answer</a>, here is a more generalized search that will allow the key to specified (not just for uid):

<pre><code>function searcharray($value, $key, $array) {
 foreach ($array as $k =&gt; $val) {
 if ($val[$key] == $value) {
 return $k;
 }
 }
 return null;
}
</code></pre>

Usage: <code>$results = searcharray('searchvalue', searchkey, $array);</code>

entityMap|blocks|key|4rkdv|text|我不得不使用un函数来查找数组中的每个元素。所以我修改了Jakub+Truneček的函数，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2fl2v|function+search_in_array_r($needle,+$array)+{
++++$found+=+array();
++++foreach+($array+as+$key+=>+$val)+{
++++++++if+($val[1]+==+$needle)+{
++++++++++++array_push($found,+$val[1]);
++++++++}
++++}
++++if+(count($found)+!=+0)
++++++++return+$found;
++++else
++++++++return+null;
}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

I had to use un function which finds every elements in an array. So I modified the function done by Jakub Truneček as follow:

<pre><code>function search_in_array_r($needle, $array) {
 $found = array();
 foreach ($array as $key =&gt; $val) {
 if ($val[1] == $needle) {
 array_push($found, $val[1]);
 }
 }
 if (count($found) != 0)
 return $found;
 else
 return null;
}
</code></pre>

entityMap|blocks|key|qpnp|text|我修改了下面描述函数的一个例子|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2cef8|数组|6ooo1|_|3p9rn|搜索|d7g5d|..。函数|dfc18|从多维数组(N级)返回$key的所有值。也许，它会对某些人有用。示例：|bp2ej|$arr+=+array(
+++++'XXX'=>array(
+++++++++++++++'YYY'=>+array(
++++++++++++++++++++'AAA'=>+array(
++++++++++++++++++++++++++'keyN'+=>'value1'
+++++++++++++++++++)
+++++++++++++++),
++++++++++++++'ZZZ'=>+array(
++++++++++++++++++++'BBB'=>+array(
++++++++++++++++++++++++++'keyN'+=>+'value2'
+++++++++++++++++++)
+++++++++++++++)
++++++++++++++//.....
+++++++++++)
);


$result+=+searchItemsByKey($arr,'keyN');

print+'';
print_r($result);
print+'';
//+OUTPUT
Array
(
++[0]+=>+value1
++[1]+=>+value2
)


Function+code:

function+searchItemsByKey($array,+$key)
{
+++$results+=+array();

++if+(is_array($array))
++{
++++if+(isset($array[$key])+&&+key($array)==$key)
++++++++$results[]+=+$array[$key];

++++foreach+($array+as+$sub_array)
++++++++$results+=+array_merge($results,+searchItemsByKey($sub_array,+$key));
++}

+return++$results;
}|code-block|syntax|javascript^0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|R|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|S|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|T|9|@]|A|@]|B|$]]|$2|G|4|H|6|7|8|U|9|@]|A|@]|B|$]]|$2|I|4|J|6|7|8|V|9|@]|A|@]|B|$]]|$2|K|4|L|6|7|8|W|9|@]|A|@]|B|$]]|$2|M|4|N|6|O|8|X|9|@]|A|@]|B|$P|Q]]]]

I modified one of examples below description function <a href="http://us3.php.net/manual/ru/function.array-search.php" rel="noreferrer">array_search</a>. Function <code>searchItemsByKey</code> return all value(s) by $key from multidimensional array ( N levels). Perhaps , it would be useful for somebody. Example:

<pre><code> $arr = array(
 'XXX'=&gt;array(
 'YYY'=&gt; array(
 'AAA'=&gt; array(
 'keyN' =&gt;'value1'
 )
 ),
 'ZZZ'=&gt; array(
 'BBB'=&gt; array(
 'keyN' =&gt; 'value2'
 )
 )
 //.....
 )
);


$result = searchItemsByKey($arr,'keyN');

print '&lt;pre&gt;';
print_r($result);
print '&lt;pre&gt;';
// OUTPUT
Array
(
 [0] =&gt; value1
 [1] =&gt; value2
)
</code></pre>

Function code:

<pre><code>function searchItemsByKey($array, $key)
{
 $results = array();

 if (is_array($array))
 {
 if (isset($array[$key]) &amp;&amp; key($array)==$key)
 $results[] = $array[$key];

 foreach ($array as $sub_array)
 $results = array_merge($results, searchItemsByKey($sub_array, $key));
 }

 return $results;
}
</code></pre>

entityMap|blocks|key|fmup3|text|您可以使用此函数；|type|unstyled|depth|inlineStyleRanges|entityRanges|data|brag5|https://github.com/serhatozles/ArrayAdvancedSearch|5099c|='2'";

$Array+=+array(
'a'+=>+array('d'+=>+'2'),
array('a'+=>+'Example+World','b'+=>+'2'),
array('c'+=>+'3'),+array('d'+=>+'4'),
);

$Result+=+ArraySearch($Array,$query,1);

echo+'';
print_r($Result);
echo+'';+

//+Output:
//+Array
//+(
//++++[0]+=>+Array
//++++++++(
//++++++++++++[a]+=>+Example+World
//++++++++++++[b]+=>+2
//++++++++)
//
//+)|code-block|syntax|javascript^0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|J|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|K|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|L|9|@]|A|@]|B|$H|I]]]]

you can use this function ;
<a href="https://github.com/serhatozles/ArrayAdvancedSearch" rel="nofollow">https://github.com/serhatozles/ArrayAdvancedSearch</a>

<pre><code>&lt;?php 
include('ArraySearch.php');

$query = "a='Example World' and b&gt;='2'";

$Array = array(
'a' =&gt; array('d' =&gt; '2'),
array('a' =&gt; 'Example World','b' =&gt; '2'),
array('c' =&gt; '3'), array('d' =&gt; '4'),
);

$Result = ArraySearch($Array,$query,1);

echo '&lt;pre&gt;';
print_r($Result);
echo '&lt;/pre&gt;'; 

// Output:
// Array
// (
// [0] =&gt; Array
// (
// [a] =&gt; Example World
// [b] =&gt; 2
// )
//
// )
</code></pre>

entityMap|blocks|key|eq2al|text|如果您使用的是(PHP5+>=+5.5.0)，则不必编写自己的函数来执行此操作，只需编写以下代码即可完成此操作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|8f5co|如果你只想要一个结果：|7g9ni|$key+=+array_search(40489,+array_column($userdb,+'uid'));|code-block|syntax|javascript|2aap3|对于多个结果|dj19s|$keys+=+array_keys(array_column($userdb,+'uid'),+40489);|17dhh|如果你有一个注释中指出的关联数组，你可以用：|d80vv|$keys+=+array_keys(array_combine(array_keys($userdb),+array_column($userdb,+'uid')),40489);|6ilng|如果您使用的是PHP+<+5.5.0，则可以使用|22i9a|此后端口|1k436|，谢谢ramsey！|abu5d|更新:我一直在做一些简单的基准测试，多个结果表单似乎是最快的，甚至比Jakub自定义函数还要快！^0|0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|Z|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|10|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|11|9|@]|A|@]|B|$H|I]]|$2|J|4|K|6|7|8|12|9|@]|A|@]|B|$]]|$2|L|4|M|6|G|8|13|9|@]|A|@]|B|$H|I]]|$2|N|4|O|6|7|8|14|9|@]|A|@]|B|$]]|$2|P|4|Q|6|G|8|15|9|@]|A|@]|B|$H|I]]|$2|R|4|S|6|7|8|16|9|@]|A|@]|B|$]]|$2|T|4|U|6|7|8|17|9|@]|A|@]|B|$]]|$2|V|4|W|6|7|8|18|9|@]|A|@]|B|$]]|$2|X|4|Y|6|7|8|19|9|@]|A|@]|B|$]]]]

If you are using (PHP 5 >= 5.5.0) you don't have to write your own function to do this, just write this line and it's done. 

If you want just one result:

<pre><code>$key = array_search(40489, array_column($userdb, 'uid'));
</code></pre>

For multiple results

<pre><code>$keys = array_keys(array_column($userdb, 'uid'), 40489);
</code></pre>

In case you have an associative array as pointed in the comments you could make it with:

<pre><code>$keys = array_keys(array_combine(array_keys($userdb), array_column($userdb, 'uid')),40489);
</code></pre>

If you are using PHP &lt; 5.5.0, you can use <a href="https://github.com/ramsey/array_column" rel="noreferrer">this backport</a>, thanks ramsey!

Update: I've been making some simple benchmarks and the multiple results form seems to be the fastest one, even faster than the Jakub custom function!

entityMap|blocks|key|e7vvk|text|/**
+*+searches+a+simple+as+well+as+multi+dimension+array
+*+@param+type+$needle
+*+@param+type+$haystack
+*+@return+boolean
+*/
public+static+function+in_array_multi($needle,+$haystack){
++++$needle+=+trim($needle);
++++if(!is_array($haystack))
++++++++return+False;

++++foreach($haystack+as+$key=>$value){
++++++++if(is_array($value)){
++++++++++++if(self::in_array_multi($needle,+$value))
++++++++++++++++return+True;
++++++++++++else
+++++++++++++++self::in_array_multi($needle,+$value);
++++++++}
++++++++else
++++++++if(trim($value)+===+trim($needle)){//visibility+fix//
++++++++++++error_log("$value+===+$needle+setting+visibility+to+1+hidden");
++++++++++++return+True;
++++++++}
++++}

++++return+False;
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript^0^^$0|$]|1|@$2|3|4|5|6|7|8|E|9|@]|A|@]|B|$C|D]]]]

<pre><code>/**
 * searches a simple as well as multi dimension array
 * @param type $needle
 * @param type $haystack
 * @return boolean
 */
public static function in_array_multi($needle, $haystack){
 $needle = trim($needle);
 if(!is_array($haystack))
 return False;

 foreach($haystack as $key=&gt;$value){
 if(is_array($value)){
 if(self::in_array_multi($needle, $value))
 return True;
 else
 self::in_array_multi($needle, $value);
 }
 else
 if(trim($value) === trim($needle)){//visibility fix//
 error_log("$value === $needle setting visibility to 1 hidden");
 return True;
 }
 }

 return False;
}
</code></pre>

entityMap|blocks|key|7ogga|text|尽管这是一个古老的问题，并且有一个公认的答案，但我还是建议对公认的答案做一个修改。因此，首先，我同意这里公认的答案是正确的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|bn0v0|function+searchArrayKeyVal($sKey,+$id,+$array)+{
+++foreach+($array+as+$key+=>+$val)+{
+++++++if+($val[$sKey]+==+$id)+{
+++++++++++return+$key;
+++++++}
+++}
+++return+false;
}|code-block|syntax|javascript|e3fsj|用函数中的参数替换预设的'uid‘，所以现在调用下面的代码意味着你可以在多个数组类型中使用一个函数。很小的变化，但会带来细微的不同。|e6se0|//+Array+Data+Of+Users
$userdb+=+array+(
++++array+('uid'+=>+'100','name'+=>+'Sandra+Shush','url'+=>+'urlof100'+),
++++array+('uid'+=>+'5465','name'+=>+'Stefanie+Mcmohn','url'+=>+'urlof100'+),
++++array+('uid'+=>+'40489','name'+=>+'Michael','url'+=>+'urlof40489'+),
);

//+Obtain+The+Key+Of+The+Array
$arrayKey+=+searchArrayKeyVal("uid",+'100',+$userdb);
if+($arrayKey!==false)+{
++++echo+"Search+Result:+",+$userdb[$arrayKey]['name'];
}+else+{
++++echo+"Search+Result+can+not+be+found";
}|4s7qf|PHP小提琴示例^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|N|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|O|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|P|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|Q|9|@]|A|@]|B|$F|G]]|$2|L|4|M|6|7|8|R|9|@]|A|@]|B|$]]]]

Even though this is an old question and has an accepted answer, Thought i would suggest one change to the accepted answer.. So first off, i agree the accepted answer is correct here.

<pre><code>function searchArrayKeyVal($sKey, $id, $array) {
 foreach ($array as $key =&gt; $val) {
 if ($val[$sKey] == $id) {
 return $key;
 }
 }
 return false;
}
</code></pre>

Replacing the preset 'uid' with a parameter in the function instead, so now calling the below code means you can use the one function across multiple array types. Small change, but one that makes the slight difference.

<pre><code> // Array Data Of Users
$userdb = array (
 array ('uid' =&gt; '100','name' =&gt; 'Sandra Shush','url' =&gt; 'urlof100' ),
 array ('uid' =&gt; '5465','name' =&gt; 'Stefanie Mcmohn','url' =&gt; 'urlof100' ),
 array ('uid' =&gt; '40489','name' =&gt; 'Michael','url' =&gt; 'urlof40489' ),
);

// Obtain The Key Of The Array
$arrayKey = searchArrayKeyVal("uid", '100', $userdb);
if ($arrayKey!==false) {
 echo "Search Result: ", $userdb[$arrayKey]['name'];
} else {
 echo "Search Result can not be found";
}
</code></pre>

<a href="http://phpfiddle.org/lite/code/8id5-m032" rel="nofollow" title="PHP-Fiddle Example">PHP Fiddle Example</a>

entityMap|blocks|key|a9t5v|text|for(+$i+=0;+$i+<+sizeof($allUsers);+$i%2B%2B)
++++{+++
++++$NEEDLE1='firstname';
++++$NEEDLE2='emailAddress';
++++$sterm='Tofind';
+++++if(isset($allUsers[$i][$NEEDLE1])+&&+isset($allUsers[$i][$NEEDLE2])
++++++++{
++++++++++++$Fname=+$allUsers[$i][$NEEDLE1];
++++++++++++$Lname=+$allUsers[$i][$NEEDLE2];

++++++++++++$pos1+=+stripos($Fname,+$sterm);
++++++++++++$pos2=stripos($Lname,+$sterm);//not+case+sensitive+

++++++++++++if($pos1+!==+false+%7C%7C$pos2+!==+false)
++++++++++++{$resultsMatched[]+=$allUsers[$i];}
++++++++++++else
++++++++++++{+++continue;}++++++++++++++
++++++++}

}
Print_r($resultsMatched);+//will+give+array+for+matched+values+even+partially+matched|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|alt5p|在上面代码的帮助下，人们可以从2D数组中的任何列中找到任何(部分匹配的)数据，因此可以根据需要找到用户id。|unstyled^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$C|D]]|$2|E|4|F|6|G|8|I|9|@]|A|@]|B|$]]]]

<pre><code>for( $i =0; $i &lt; sizeof($allUsers); $i++)
 { 
 $NEEDLE1='firstname';
 $NEEDLE2='emailAddress';
 $sterm='Tofind';
 if(isset($allUsers[$i][$NEEDLE1]) &amp;&amp; isset($allUsers[$i][$NEEDLE2])
 {
 $Fname= $allUsers[$i][$NEEDLE1];
 $Lname= $allUsers[$i][$NEEDLE2];

 $pos1 = stripos($Fname, $sterm);
 $pos2=stripos($Lname, $sterm);//not case sensitive 

 if($pos1 !== false ||$pos2 !== false)
 {$resultsMatched[] =$allUsers[$i];}
 else
 { continue;} 
 }

}
Print_r($resultsMatched); //will give array for matched values even partially matched
</code></pre>

With help of above code one can find any(partially matched) data from any column in 2D array so user id can be found as required in question.

entityMap|blocks|key|bciov|text|$a+=+['x'+=>+['eee',+'ccc'],+'b'+=>+['zzz']];

$found+=+null;
$search+=+'eee';

array_walk($a,+function+($k,+$v)+use+($search,+&$found)+{
++++if+(in_array($search,+$k))+{
++++++++$found+=+$v;
++++}
});

var_dump($found);|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript^0^^$0|$]|1|@$2|3|4|5|6|7|8|E|9|@]|A|@]|B|$C|D]]]]

<pre><code>$a = ['x' =&gt; ['eee', 'ccc'], 'b' =&gt; ['zzz']];

$found = null;
$search = 'eee';

array_walk($a, function ($k, $v) use ($search, &amp;$found) {
 if (in_array($search, $k)) {
 $found = $v;
 }
});

var_dump($found);
</code></pre>

entityMap|blocks|key|7om6p|text|在创建的函数@mayhem的基础上展开，这个示例更像是一个“模糊”搜索，以防您只想匹配part+(|type|unstyled|depth|inlineStyleRanges|entityRanges|data|ahcu7|最多|7bvr4|)搜索字符串：|enu5t|function+searchArrayKeyVal($sKey,+$id,+$array)+{
++++foreach+($array+as+$key+=>+$val)+{
++++++++if+(strpos(strtolower($val[$sKey]),+strtolower(trim($id)))+!==+false)+{
++++++++++++return+$key;
++++++++}
++++}
+++++++++return+false;
+}|code-block|syntax|javascript|17kmd|例如，数组中的值是Welcome+to+New+York！你只想要第一个“纽约！”^0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|N|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|O|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|P|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|Q|9|@]|A|@]|B|$J|K]]|$2|L|4|M|6|7|8|R|9|@]|A|@]|B|$]]]]

Expanding on the function @mayhem created, this example would be more of a "fuzzy" search in case you just want to match part (most) of a search string:

<pre><code> function searchArrayKeyVal($sKey, $id, $array) {
 foreach ($array as $key =&gt; $val) {
 if (strpos(strtolower($val[$sKey]), strtolower(trim($id))) !== false) {
 return $key;
 }
 }
 return false;
 }
</code></pre>

For example the value in the array is Welcome to New York! and you wanted the first instance of just "New York!"

entityMap|blocks|key|28nd0|text|试试这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|dk0pq|$value)+{
++++++++$current_key=$key;
++++++++if($needle===$value+OR+(is_array($value)+&&+
++++++++++++recursive_array_search($needle,$value)+!==+false))+{
+++++++++++++return+$current_key;
++++++++}
++++}
++++return+false;
+}
+?>|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Try this

<pre><code>&lt;?php
 function recursive_array_search($needle,$haystack) {
 foreach($haystack as $key=&gt;$value) {
 $current_key=$key;
 if($needle===$value OR (is_array($value) &amp;&amp; 
 recursive_array_search($needle,$value) !== false)) {
 return $current_key;
 }
 }
 return false;
 }
 ?&gt;
</code></pre>

entityMap|blocks|key|4ia4g|text|在更高版本的>=(PHP5.5.0)中，您可以使用以下一行程序：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|96a54|$key+=+array_search('100',+array_column($userdb,+'uid'));|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

In later versions of PHP (>= 5.5.0) you can use this one-liner:

<pre><code>$key = array_search('100', array_column($userdb, 'uid'));
</code></pre>

entityMap|blocks|key|2a54d|text|我想在下面的数组中检查|type|unstyled|depth|inlineStyleRanges|entityRanges|data|7la26|子数组中是否存在'abc‘|74ko5|$arr+=+array(
++++array(
++++++++'title'+=>+'abc'
++++)
);|code-block|syntax|javascript|3u1id|然后我就可以用这个|fpkem|$res+=+array_search('abc',+array_column($arr,+'title'));
if($res+==+''){
++++echo+'exists';
}+else+{
++++echo+'notExists';
}|dh8o1|我认为这是最简单的定义^0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|P|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|Q|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|R|9|@]|A|@]|B|$H|I]]|$2|J|4|K|6|7|8|S|9|@]|A|@]|B|$]]|$2|L|4|M|6|G|8|T|9|@]|A|@]|B|$H|I]]|$2|N|4|O|6|7|8|U|9|@]|A|@]|B|$]]]]

I want to check tha in the following array <code>$arr</code> is there 'abc' exists in sub arrays or not

<pre><code>$arr = array(
 array(
 'title' =&gt; 'abc'
 )
);
</code></pre>

Then i can use this

<pre><code>$res = array_search('abc', array_column($arr, 'title'));
if($res == ''){
 echo 'exists';
} else {
 echo 'notExists';
}
</code></pre>

I think This is the Most simple way to define

entityMap|blocks|key|19p8c|text|这里有一个相同的衬垫，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|5ul24|$pic_square+=+$userdb[array_search($uid,array_column($userdb,+'uid'))]['pic_square'];|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Here is one liner for the same,

<pre><code>$pic_square = $userdb[array_search($uid,array_column($userdb, 'uid'))]['pic_square'];
</code></pre>

entityMap|blocks|key|cmkem|text|如果问题即|type|unstyled|depth|inlineStyleRanges|entityRanges|data|8b7pr|$a+=+[
+++++[
+++++++"_id"+=>+"5a96933414d48831a41901f2",
+++++++"discount_amount"+=>+3.29,
+++++++"discount_id"+=>+"5a92656a14d488570c2c44a2",
+++++],
+++++[
+++++++"_id"+=>+"5a9790fd14d48879cf16a9e8",
+++++++"discount_amount"+=>+4.53,
+++++++"discount_id"+=>+"5a9265b914d488548513b122",
+++++],
+++++[
+++++++"_id"+=>+"5a98083614d488191304b6c3",
+++++++"discount_amount"+=>+15.24,
+++++++"discount_id"+=>+"5a92806a14d48858ff5c2ec3",
+++++],
+++++[
+++++++"_id"+=>+"5a982a4914d48824721eafe3",
+++++++"discount_amount"+=>+45.74,
+++++++"discount_id"+=>+"5a928ce414d488609e73b443",
+++++],
++++[
+++++++"_id"+=>+"5a982a4914d48824721eafe55",
+++++++"discount_amount"+=>+10.26,
+++++++"discount_id"+=>+"5a928ce414d488609e73b443",
+++++],
+++];|code-block|syntax|javascript|5peva|答案：|fa8vi|function+searchForId($id,+$array)+{
++++$did=0;
++++$dia=0;
+++foreach+($array+as+$key+=>+$val)+{
+++++++if+($val['discount_id']+===+$id)+{
+++++++++++$dia+%2B=$val['discount_amount'];
+++++++++++$did%2B%2B;
+++++++}
+++}
++++if($dia+!=+'')+{
++++++++echo+$dia;
++++++++var_dump($did);
++++}
+++return+null;
};
print_r(searchForId('5a928ce414d488609e73b443',$a));^0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|L|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|M|9|@]|A|@]|B|$F|G]]|$2|H|4|I|6|7|8|N|9|@]|A|@]|B|$]]|$2|J|4|K|6|E|8|O|9|@]|A|@]|B|$F|G]]]]

If question i.e.

<pre><code>$a = [
 [
 "_id" =&gt; "5a96933414d48831a41901f2",
 "discount_amount" =&gt; 3.29,
 "discount_id" =&gt; "5a92656a14d488570c2c44a2",
 ],
 [
 "_id" =&gt; "5a9790fd14d48879cf16a9e8",
 "discount_amount" =&gt; 4.53,
 "discount_id" =&gt; "5a9265b914d488548513b122",
 ],
 [
 "_id" =&gt; "5a98083614d488191304b6c3",
 "discount_amount" =&gt; 15.24,
 "discount_id" =&gt; "5a92806a14d48858ff5c2ec3",
 ],
 [
 "_id" =&gt; "5a982a4914d48824721eafe3",
 "discount_amount" =&gt; 45.74,
 "discount_id" =&gt; "5a928ce414d488609e73b443",
 ],
 [
 "_id" =&gt; "5a982a4914d48824721eafe55",
 "discount_amount" =&gt; 10.26,
 "discount_id" =&gt; "5a928ce414d488609e73b443",
 ],
 ];
</code></pre>

Ans: 

<pre><code>function searchForId($id, $array) {
 $did=0;
 $dia=0;
 foreach ($array as $key =&gt; $val) {
 if ($val['discount_id'] === $id) {
 $dia +=$val['discount_amount'];
 $did++;
 }
 }
 if($dia != '') {
 echo $dia;
 var_dump($did);
 }
 return null;
};
print_r(searchForId('5a928ce414d488609e73b443',$a));
</code></pre>

entityMap|blocks|key|e9p4p|text|只是分享一下，也许可以这样。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|db8of|if(+!+function_exists('arraySearchMulti')){
function+arraySearchMulti($search,$key,$array,$returnKey=false)
{
++++foreach+($array+as+$k+=>+$val)+{
++++++++if+(isset($val[$key]))+{
++++++++++++if+((string)$val[$key]+==+(string)$search)+{
++++++++++++++++return+($returnKey+?+$k+:+$val);
++++++++++++}
++++++++}else{
++++++++++++return+(is_array($val)+?+arraySearchMulti($search,$key,$val,$returnKey)+:+null);
++++++++}
++++}
++++return+null;
}}|code-block|syntax|javascript^0|0^^$0|$]|1|@$2|3|4|5|6|7|8|H|9|@]|A|@]|B|$]]|$2|C|4|D|6|E|8|I|9|@]|A|@]|B|$F|G]]]]

Just share, maybe can like this.

<pre><code>if( ! function_exists('arraySearchMulti')){
function arraySearchMulti($search,$key,$array,$returnKey=false)
{
 foreach ($array as $k =&gt; $val) {
 if (isset($val[$key])) {
 if ((string)$val[$key] == (string)$search) {
 return ($returnKey ? $k : $val);
 }
 }else{
 return (is_array($val) ? arraySearchMulti($search,$key,$val,$returnKey) : null);
 }
 }
 return null;
}}
</code></pre>

entityMap|blocks|key|2du3c|text|您可以使用array|type|unstyled|depth|inlineStyleRanges|entityRanges|data|bup6q|_|9qq93|专栏。|5c42v|$search_value+=+'5465';
$search_key+++=+'uid';
$user+=+array_search($search_value,+array_column($userdb,+$search_key));

print_r($userdb[$user]);|code-block|syntax|javascript|a8drl|5465|bral5|是要搜索的用户ID，|escvj|uid|864hn|是包含用户ID和|7lm4m|$userdb|a75ue|是问题中定义的数组。^0|0|0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|X|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|Y|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|Z|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|10|9|@]|A|@]|B|$J|K]]|$2|L|4|M|6|7|8|11|9|@]|A|@]|B|$]]|$2|N|4|O|6|7|8|12|9|@]|A|@]|B|$]]|$2|P|4|Q|6|7|8|13|9|@]|A|@]|B|$]]|$2|R|4|S|6|7|8|14|9|@]|A|@]|B|$]]|$2|T|4|U|6|7|8|15|9|@]|A|@]|B|$]]|$2|V|4|W|6|7|8|16|9|@]|A|@]|B|$]]]]

You can use array_column for that.
<pre><code>$search_value = '5465';
$search_key = 'uid';
$user = array_search($search_value, array_column($userdb, $search_key));

print_r($userdb[$user]);
</code></pre>
5465 is the user ID you want to search, uid is the key that contains user ID and $userdb is the array that is defined in the question.

entityMap|blocks|key|4ajo|text|没有其他人使用过数组|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3ee39|_|a08ta|reduce，所以我想添加这个方法...|12mjg|$find_by_uid+=+'100';
$is_in_array+=+array_reduce($userdb,+function($carry,+$user)+use+($find_by_uid){
++++return+$carry+?+$carry+:+$user['uid']+===+$find_by_uid;
});+
//+Returns+true|code-block|syntax|javascript|78ujv|使您能够更好地控制“搜索”逻辑，而不是数组|eteva|d74f5|search()。|2ng87|请注意，我在这里使用了严格相等，但您可以选择不同的比较逻辑。$carry意味着比较只需为真一次，最终结果也将为真。^0|0|0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|S|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|T|9|@]|A|@]|B|$]]|$2|E|4|F|6|7|8|U|9|@]|A|@]|B|$]]|$2|G|4|H|6|I|8|V|9|@]|A|@]|B|$J|K]]|$2|L|4|M|6|7|8|W|9|@]|A|@]|B|$]]|$2|N|4|D|6|7|8|X|9|@]|A|@]|B|$]]|$2|O|4|P|6|7|8|Y|9|@]|A|@]|B|$]]|$2|Q|4|R|6|7|8|Z|9|@]|A|@]|B|$]]]]

No one else has used array_reduce yet, so thought I'd add this approach...
<pre><code>$find_by_uid = '100';
$is_in_array = array_reduce($userdb, function($carry, $user) use ($find_by_uid){
 return $carry ? $carry : $user['uid'] === $find_by_uid;
}); 
// Returns true
</code></pre>
Gives you more fine control over the 'search' logic than array_search().
Note that I have used strict equality here but you could opt for different comparison logic. The $carry means the comparison needs to be true once, and the final result will be TRUE.

entityMap|blocks|key|fv6cc|text|下面是一个更好的解决方案，用于从数据库或多维数组中提取数据|type|unstyled|depth|inlineStyleRanges|entityRanges|data|s0sf|多维数组示例：|b7n6n|$records+=+array(
++++++++++++array(
++++++++++++++++'id'+=>+2135,
++++++++++++++++'first_name'+=>+'John',
++++++++++++++++'last_name'+=>+'Doe',
++++++++++++),
++++++++++++array(
++++++++++++++++'id'+=>+3245,
++++++++++++++++'first_name'+=>+'Sally',
++++++++++++++++'last_name'+=>+'Smith',
++++++++++++),
++++++++++++array(
++++++++++++++++'id'+=>+5342,
++++++++++++++++'first_name'+=>+'Jane',
++++++++++++++++'last_name'+=>+'Jones',
++++++++++++),
++++++++++++array(
++++++++++++++++'id'+=>+5623,
++++++++++++++++'first_name'+=>+'Peter',
++++++++++++++++'last_name'+=>+'Doe',
++++++++++++)
++++++++++++);


++++++++++++function+search_user_by_name($name,+$array)+{
+++++++++++++++++++++++++++++foreach+($array+as+$keys)+{
+++++++++++++++++++++++++++++++++foreach+($keys+as+$key+=>+$_user_record)+{
+++++++++++++++++++++++++++++++++++++if+($_user_record+==+$name)+{
+++++++++++++++++++++++++++++++++++++++++return+[$key+=>+$_user_record];//Return+and+array+of+user
+++++++++++++++++++++++++++++++++++++}
+++++++++++++++++++++++++++++++++}
+++++++++++++++++++++++++++++}
+++++++++++++++++++++++++++++return+null;
++++++++++++++++++++++++}|code-block|syntax|javascript|3ur0n|调用函数：|b385k|$results+=+search_user_by_name('John',+$records);
+++++++++print_r($results);|b48f2|输出：^0|0|0|0|0|0^^$0|$]|1|@$2|3|4|5|6|7|8|P|9|@]|A|@]|B|$]]|$2|C|4|D|6|7|8|Q|9|@]|A|@]|B|$]]|$2|E|4|F|6|G|8|R|9|@]|A|@]|B|$H|I]]|$2|J|4|K|6|7|8|S|9|@]|A|@]|B|$]]|$2|L|4|M|6|G|8|T|9|@]|A|@]|B|$H|I]]|$2|N|4|O|6|7|8|U|9|@]|A|@]|B|$]]]]

Here is a better solution, in case your pulling data from a database or a multidimensional array
Example of a multidimensional array:
<pre><code>$records = array(
 array(
 'id' =&gt; 2135,
 'first_name' =&gt; 'John',
 'last_name' =&gt; 'Doe',
 ),
 array(
 'id' =&gt; 3245,
 'first_name' =&gt; 'Sally',
 'last_name' =&gt; 'Smith',
 ),
 array(
 'id' =&gt; 5342,
 'first_name' =&gt; 'Jane',
 'last_name' =&gt; 'Jones',
 ),
 array(
 'id' =&gt; 5623,
 'first_name' =&gt; 'Peter',
 'last_name' =&gt; 'Doe',
 )
 );


 function search_user_by_name($name, $array) {
 foreach ($array as $keys) {
 foreach ($keys as $key =&gt; $_user_record) {
 if ($_user_record == $name) {
 return [$key =&gt; $_user_record];//Return and array of user
 }
 }
 }
 return null;
 }
</code></pre>
Call the function:
<pre><code>$results = search_user_by_name('John', $records);
 print_r($results);
 
</code></pre>
Output: <code>Array ( [first_name] =&gt; John )</code>

I have an array where I want to search the <code>uid</code> and get the key of the array.

<h2>Examples</h2>

Assume we have the following 2-dimensional array:

<pre><code>$userdb = array(
 array(
 'uid' =&gt; '100',
 'name' =&gt; 'Sandra Shush',
 'pic_square' =&gt; 'urlof100'
 ),
 array(
 'uid' =&gt; '5465',
 'name' =&gt; 'Stefanie Mcmohn',
 'pic_square' =&gt; 'urlof100'
 ),
 array(
 'uid' =&gt; '40489',
 'name' =&gt; 'Michael',
 'pic_square' =&gt; 'urlof40489'
 )
);
</code></pre>

The function call <code>search_by_uid(100)</code> (uid of first user) should return <code>0</code>.

The function call <code>search_by_uid(40489)</code> should return <code>2</code>.

I tried making loops, but I want a faster executing code.

PHP multidimensional array search by value

数据库

 我有一个数组，我想在其中搜索 并获取数组的密钥。 示例 假设我们有以下二维数组： $userdb = array(    array(        'uid' => '100',        'name' => 'Sandra Shush',        'pic_square' => 'urlof100'  ...

问PHP多维数组按值搜索
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