blocks|key|981568|text|循环将多次执行一系列操作。因此，对于数组中的每个元素，您将检查它是否等于您想要更改的元素，如果是，则更改它。另外，一定要在字符串两边加上引号|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981569|//Setup+the+array+of+string
$asting+=+array('work','home','sky','door')

/**
Loop+over+the+array+of+strings+with+a+counter+$i,
Continue+doing+this+until+it+hits+the+last+element+in+the+array
which+will+be+at+count($asting)
*/
for($i+=+0;+$i+<+count($asting);$i%2B%2B){
+++//Check+if+the+value+at+the+'ith'+element+in+the+array+is+the+one+you+want+to+change
++//if+it+is,+set+the+ith+element+to+0
++++if+($asting[$i]+==+'work'+%7C%7C+$asting[$i]+==+'home')
+++++++$asting[$i]+=+0;
}|code-block|syntax|javascript|981570|以下是一些建议阅读：|981571|http://www.php.net/manual/en/language.types.array.php|offset|length|981572|http://www.php.net/manual/en/language.control-structures.php|981573|但是，如果您正在为诸如循环之类的东西而苦苦挣扎，那么您可能需要阅读一些入门编程材料。这应该能帮助你真正理解到底发生了什么。|981574|entityMap|0|LINK|mutability|MUTABLE|url|1^0|0|0|0|0|1H|0|0|0|1O|1|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|11|8|@]|9|@$K|12|L|13|1|14]]|A|$]]|$1|M|3|N|5|6|7|15|8|@]|9|@$K|16|L|17|1|18]]|A|$]]|$1|O|3|P|5|6|7|19|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|J]]|X|$5|T|U|V|A|$W|N]]]]

A loop will perform a series of actions many times. So, for each element in your array, you would check if it is equal to the one you want to change and if it is, change it. Also be sure to put quote marks around your strings

<pre><code>//Setup the array of string
$asting = array('work','home','sky','door')

/**
Loop over the array of strings with a counter $i,
Continue doing this until it hits the last element in the array
which will be at count($asting)
*/
for($i = 0; $i &lt; count($asting);$i++){
 //Check if the value at the 'ith' element in the array is the one you want to change
 //if it is, set the ith element to 0
 if ($asting[$i] == 'work' || $asting[$i] == 'home')
 $asting[$i] = 0;
}
</code></pre>

Here is some suggested reading:

<a href="http://www.php.net/manual/en/language.types.array.php">http://www.php.net/manual/en/language.types.array.php</a>

<a href="http://www.php.net/manual/en/language.control-structures.php">http://www.php.net/manual/en/language.control-structures.php</a>

But if you are struggling on stuff such as looping, you may want to read some introductory programming material. Which should help you really understand what's going on.

blocks|key|981598|text|您还可以在str_replace上将数组作为参数1和2提供...|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981599|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You can also give array as a parameter 1 and 2 on str_replace...

blocks|key|766236|text|这是我的最终代码|type|unstyled|depth|inlineStyleRanges|entityRanges|data|766237|//Setup+the+array+of+string
$asting+=+array('work','home','sky','door','march');

/**
Loop+over+the+array+of+strings+with+a+counter+$i,
Continue+doing+this+until+it+hits+the+last+element+in+the+array
which+will+be+at+count($asting)
*/
for($i+=+0;+$i+<+count($asting);+$i%2B%2B)+{
//Check+if+the+value+at+the+'ith'+element+in+the+array+is+the+one+you+want+to+change
//if+it+is,+set+the+ith+element+to+0
if+($asting[$i]+==+'work')+{
+++$asting[$i]+=+20;
}+elseif($asting[$i]+==+'home'){
++++$asting[$i]+=+30;

}else{
++++$asting[$i]+=+0;
}

echo+$asting[$i]." ";

$total+%2B=+$asting[$i];
}

echo+$total;|code-block|syntax|javascript|766238|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

this my final code

<pre><code>//Setup the array of string
$asting = array('work','home','sky','door','march');

/**
Loop over the array of strings with a counter $i,
Continue doing this until it hits the last element in the array
which will be at count($asting)
*/
for($i = 0; $i &lt; count($asting); $i++) {
//Check if the value at the 'ith' element in the array is the one you want to change
//if it is, set the ith element to 0
if ($asting[$i] == 'work') {
 $asting[$i] = 20;
} elseif($asting[$i] == 'home'){
 $asting[$i] = 30;

}else{
 $asting[$i] = 0;
}

echo $asting[$i]."&lt;br&gt;&lt;br&gt;";

$total += $asting[$i];
}

echo $total;
</code></pre>

blocks|key|981719|text|只需指向for循环的一个小指针。许多人没有意识到第二个比较任务是在每次新的迭代中完成的。因此，如果它是一个大的数组或计算的情况，你可以通过这样做来优化循环：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981720|for+($i+=+0,+$c+=+count($asting);+$i+<+$c;+$i%2B%2B)+{...}|code-block|syntax|javascript|981721|您可能还想查看原始问题的http://php.net/manual/en/function.array-replace.php，除非代码确实是最终的:)|offset|length|981722|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/manual/en/function.array-replace.php^0|0|0|C|1F|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

Just a small point to the for loop. Many dont realize the second comparing task is done every new iteration. So if it was a case of big array or calculation you could optimize loop a bit by doing: 

<pre><code>for ($i = 0, $c = count($asting); $i &lt; $c; $i++) {...}
</code></pre>

You may also want to see <a href="http://php.net/manual/en/function.array-replace.php" rel="nofollow">http://php.net/manual/en/function.array-replace.php</a> for original problem unless the code really is final :)

blocks|key|766684|text|一个更优雅和更短的解决方案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|766685|$aArray+=+array('work','home','sky','door');+++

foreach($aArray+as+&$sValue)
{
+++++if+(+$sValue!='work'+&&+$sValue!='home'+)+$sValue=0;
}|code-block|syntax|javascript|766686|&运算符是指向数组中特定原始字符串的指针。(而不是该字符串的副本)，您可以通过这种方式为数组中的字符串分配一个新值。唯一不能做的事情是任何可能扰乱数组顺序的事情，比如unset()或键操作。|766687|上述示例的结果数组将为|766688|$aArray+=+array('work','home',+0,+0)|766689|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

A bit more elegant and shorter solution.

<pre><code>$aArray = array('work','home','sky','door'); 

foreach($aArray as &amp;$sValue)
{
 if ( $sValue!='work' &amp;&amp; $sValue!='home' ) $sValue=0;
}
</code></pre>

The &amp; operator is a pointer to the particular original string in the array. (instead of a copy of that string)
You can that way assign a new value to the string in the array. The only thing you may not do is anything that may disturb the order in the array, like unset() or key manipulation.

The resulting array of the example above will be

<pre><code>$aArray = array('work','home', 0, 0)
</code></pre>

blocks|key|766704|text|另一种更快的方法，但确实需要一个循环：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|766705|//Setup+the+array+of+string
++++$asting+=+array('bar',+'market',+'work',+'home',+'sky',+'door');

//Setup+the+array+of+replacings
++++$replace+=+array('home',+'work');

//Loop+them+through+str_replace()+replacing+with+0+or+any+other+value...
++++foreach+($replace+as+$val)+$asting+=+str_replace($val,+0,+$asting);

//See+what+results+brings:++++
++++print_r+($asting);|code-block|syntax|javascript|766706|将输出：|766707|Array
(
++++[0]+=>+bar
++++[1]+=>+market
++++[2]+=>+0
++++[3]+=>+0
++++[4]+=>+sky
++++[5]+=>+door
)|766708|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

A bit other and much quicker way, but true, need a loop:

<pre><code>//Setup the array of string
 $asting = array('bar', 'market', 'work', 'home', 'sky', 'door');

//Setup the array of replacings
 $replace = array('home', 'work');

//Loop them through str_replace() replacing with 0 or any other value...
 foreach ($replace as $val) $asting = str_replace($val, 0, $asting);

//See what results brings: 
 print_r ($asting);
</code></pre>

Will output:

<pre><code>Array
(
 [0] =&gt; bar
 [1] =&gt; market
 [2] =&gt; 0
 [3] =&gt; 0
 [4] =&gt; sky
 [5] =&gt; door
)
</code></pre>

blocks|key|981788|text|另一种使用array_map的方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981789|$original+=+array('work','home','sky','door');

$mapped+=+array_map(function($i){
++++$exclude+=+array('work','home');
++++return+in_array($i,+$exclude)+?+0+:+$i;+
},+$original);|code-block|syntax|javascript|981790|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

An alternative using array_map:

<pre><code>$original = array('work','home','sky','door');

$mapped = array_map(function($i){
 $exclude = array('work','home');
 return in_array($i, $exclude) ? 0 : $i; 
}, $original);
</code></pre>

blocks|key|981796|text|您可以尝试array_walk函数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981797|function+zeros(&$value)+
{+
++++if+($value+!=+'home'+&&+$value+!=+'work'){$value+=+0;}++++++
}+++

+$asting+=+array('work','home','sky','door','march');+++

+array_walk($asting,+'zeros');
+print_r($asting);|code-block|syntax|javascript|981798|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

you may try array_walk function:

<pre><code>function zeros(&amp;$value) 
{ 
 if ($value != 'home' &amp;&amp; $value != 'work'){$value = 0;} 
} 

 $asting = array('work','home','sky','door','march'); 

 array_walk($asting, 'zeros');
 print_r($asting);
</code></pre>

blocks|key|981808|text|尝尝这个|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981809|$your_array+=+array('work','home','sky','door');
$rep+=+array('home',+'work');
foreach($rep+as+$key=>$val){
+++++$key+=+array_search($val,+$your_array);
+++++$your_array[$key]+=+0;
}
print_r($your_array);|code-block|syntax|javascript|981810|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try This
<pre><code>$your_array = array('work','home','sky','door');
$rep = array('home', 'work');
foreach($rep as $key=&gt;$val){
 $key = array_search($val, $your_array);
 $your_array[$key] = 0;
}
print_r($your_array);
</code></pre>

blocks|key|981849|text|这个页面上有一些技术可以实现零迭代函数调用--这在性能方面是很好的。为了获得最好的可维护性，我建议将目标字符串列表分离为一个查找数组。通过引用修改原始数组值，可以快速替换整个字符串，并将非目标值合并为0。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|981850|代码：(Demo)|offset|length|981851|$array+=+['work',+'homework',+'home',+'sky',+'door'];

$keep+=+['work',+'home'];
$lookup+=+array_combine($keep,+$keep);

foreach+($array+as+&$v)+{
++++$v+=+$lookup[$v]+??+0;
}

var_export($array);|code-block|syntax|javascript|981852|输出：|981853|array+(
++0+=>+'work',
++1+=>+0,
++2+=>+'home',
++3+=>+0,
++4+=>+0,
)|981854|只需扩展$keep，就可以非常容易、干净地扩展目标字符串列表。|style|CODE|981855|981856|如果你不想要一个经典的循环，你可以使用相同的技术，而不需要修改原始数组。(Demo)|981857|var_export(
++++array_map(fn($v)+=>+$lookup[$v]+??+0,+$array)
);|981858|entityMap|0|LINK|mutability|MUTABLE|url|https://3v4l.org/M3Q9d|1|https://3v4l.org/eWOPC^0|0|4|4|0|0|0|0|0|4|5|0|0|11|4|1|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|18|8|@]|9|@$D|19|E|1A|1|1B]]|A|$]]|$1|F|3|G|5|H|7|1C|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|1D|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|1E|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|1F|8|@$D|1G|E|1H|Q|R]]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1I|8|@]|9|@]|A|$]]|$1|T|3|U|5|6|7|1J|8|@]|9|@$D|1K|E|1L|1|1M]]|A|$]]|$1|V|3|W|5|H|7|1N|8|@]|9|@]|A|$I|J]]|$1|X|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]]|Y|$Z|$5|10|11|12|A|$13|14]]|15|$5|10|11|12|A|$13|16]]]]

There are a few techniques on this page that make zero iterated function calls -- which is good performance-wise. For best maintainability, I recommend separating your list of targeted string as a lookup array. By modifying the original array values by reference, you can swiftly replace whole strings and null coalesce non-targeted values to 0.
Code: (<a href="https://3v4l.org/M3Q9d" rel="nofollow noreferrer">Demo</a>)
<pre><code>$array = ['work', 'homework', 'home', 'sky', 'door'];

$keep = ['work', 'home'];
$lookup = array_combine($keep, $keep);

foreach ($array as &amp;$v) {
 $v = $lookup[$v] ?? 0;
}

var_export($array);
</code></pre>
Output:
<pre><code>array (
 0 =&gt; 'work',
 1 =&gt; 0,
 2 =&gt; 'home',
 3 =&gt; 0,
 4 =&gt; 0,
)
</code></pre>
You can very easily, cleanly extend your list of targeted strings by merely extending <code>$keep</code>.
<hr />
If you don't want a classic loop, you can use the same technique without modifying the original array. (<a href="https://3v4l.org/eWOPC" rel="nofollow noreferrer">Demo</a>)
<pre><code>var_export(
 array_map(fn($v) =&gt; $lookup[$v] ?? 0, $array)
);
</code></pre>

want to replace the array value with 0, exclude work and home

<pre><code>array(work,home,sky,door);
</code></pre>

I want use php to replace this array value,

I have try to use this function to replace this array

<pre><code>$asting = array(work,home,sky,door);
$a = str_replace("work","0",$asting);
</code></pre>

how about my array is infinity to add from the form submitted, but I want to replace the value to 0 exclude the work &amp; home only?

php - replace array value

要将数组值替换为0，不包括工作和家庭array(work,home,sky,door);我想用php替换这个数组值，我试着用这个函数来替换这个数组$asting = array(work,home,sky,door);$a = str_replace("work","0",$asting);如果我从提交的表单中添加的数...

问php -替换数组值
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