blocks|key|100080|text|听起来您需要array_fill()和array_merge()|type|unstyled|depth|inlineStyleRanges|entityRanges|data|100081|http://us1.php.net//manual/en/function.array-fill.php|offset|length|100082|http://www.php.net//manual/en/function.array-merge.php|100083|100084|创建一个新数组|unordered-list-item|100085|使用array_fill()填充0的|100086|用相应索引中的旧值覆盖新数组中的索引|100087|100088|$newarray+=+array_fill(0,+23,+0);|style|CODE|100089|$newarray+=+array_merge($row,+$newarray);|100090|entityMap|0|LINK|mutability|MUTABLE|url|1^0|0|0|1H|0|0|0|1I|1|0|0|0|0|0|0|0|X|0|0|15|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@$D|16|E|17|1|18]]|A|$]]|$1|F|3|G|5|6|7|19|8|@]|9|@$D|1A|E|1B|1|1C]]|A|$]]|$1|H|3|-4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|I|3|J|5|K|7|1E|8|@]|9|@]|A|$]]|$1|L|3|M|5|K|7|1F|8|@]|9|@]|A|$]]|$1|N|3|O|5|K|7|1G|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|1H|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1I|8|@$D|1J|E|1K|S|T]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1L|8|@$D|1M|E|1N|S|T]]|9|@]|A|$]]|$1|W|3|-4|5|6|7|1O|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|C]]|13|$5|Z|10|11|A|$12|G]]]]

Sounds like you want array_fill() and array_merge()

<a href="http://us1.php.net//manual/en/function.array-fill.php" rel="nofollow">http://us1.php.net//manual/en/function.array-fill.php</a>

<a href="http://www.php.net//manual/en/function.array-merge.php" rel="nofollow">http://www.php.net//manual/en/function.array-merge.php</a>

<ul>
<li>Create a new array</li>
<li>Use array_fill() to fill it with 0's</li>
<li>Overwrite the indexes in the new array with the values from the old ones in the appropriate indexes</li>
</ul>

<code>$newarray = array_fill(0, 23, 0);</code> 
<code>$newarray = array_merge($row, $newarray);</code>

blocks|key|651243|text|只是稍微短一点|type|unstyled|depth|inlineStyleRanges|entityRanges|data|651244|for($i=0;+$i<=10;+$i%2B%2B)+{
++if+($i>0)+$string+.=+',+';
++$string+.=+isset($row[$i]['something'])+?+$row[$i]['something']+:+'0';
}|code-block|syntax|javascript|651245|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|$]]

just a little shorter

<pre><code>for($i=0; $i&lt;=10; $i++) {
 if ($i&gt;0) $string .= ', ';
 $string .= isset($row[$i]['something']) ? $row[$i]['something'] : '0';
}
</code></pre>

blocks|key|2562552|text|array_fill初始化您的新数组，foreach覆盖选定的索引，join创建最终字符串，这是一种可以接受的方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2562553|$newArray=array_fill(0,+10,+0);
foreach($row+as+$key+=>+$value)+$newArray[$key]+=+array_shift($value);
echo+join('+',$newArray);|code-block|syntax|javascript|2562554|entityMap|0|LINK|mutability|MUTABLE|url|http://us1.php.net//manual/en/function.array-fill.php|1|http://us1.php.net/manual/de/function.join.php^0|J|7|0|A|0|Y|4|1|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]|$9|10|A|11|1|12]]|E|$]]|$1|F|3|G|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]|S|$5|N|O|P|E|$Q|T]]]]

<a href="http://us1.php.net//manual/en/function.array-fill.php" rel="nofollow">array_fill</a> to initialize your new array, foreach to override the selected indexes and <a href="http://us1.php.net/manual/de/function.join.php" rel="nofollow">join</a> to create the final string, it's an acceptable way to go. 

<pre><code>$newArray=array_fill(0, 10, 0);
foreach($row as $key =&gt; $value) $newArray[$key] = array_shift($value);
echo join(' ',$newArray);
</code></pre>

blocks|key|651322|text|使用array_fill和数组操作数%2B|type|unstyled|depth|inlineStyleRanges|entityRanges|data|651323|$row['10']['something']+=+"21";
$row['5']['something']+=+"42";

echo+"row:"+;
print_r(+$row+);

$maxIdx+=+max(array_keys($row))+%2B+1;
$newarray+=+array_fill(0,++$maxIdx+,+0+);

echo+"newarray:"+;
print_r(+$newarray+);

$newrow+=+$row+%2B+$newarray;
ksort($newrow);
echo+"newrow:"+;
print_r(+$newrow+);|code-block|syntax|javascript|651324|结果|651325|row:

Array+(+[10]+=>+Array+(+[something]+=>+21+)+[5]+=>+Array+(+[something]+=>+42+)+)

newarray:

Array+(+[0]+=>+0+[1]+=>+0+[2]+=>+0+[3]+=>+0+[4]+=>+0+[5]+=>+0+[6]+=>+0+[7]+=>+0+[8]+=>+0+[9]+=>+0+[10]+=>+0+)

newrow:

Array+(+[0]+=>+0+[1]+=>+0+[2]+=>+0+[3]+=>+0+[4]+=>+0+[5]+=>+Array+(+[something]+=>+42+)+[6]+=>+0+[7]+=>+0+[8]+=>+0+[9]+=>+0+[10]+=>+Array+(+[something]+=>+21+)+)|651326|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|$]]

With array_fill and Array Operand + 

<pre><code>$row['10']['something'] = "21";
$row['5']['something'] = "42";

echo "&lt;p&gt;row:&lt;p&gt;" ;
print_r( $row );

$maxIdx = max(array_keys($row)) + 1;
$newarray = array_fill(0, $maxIdx , 0 );

echo "&lt;p&gt;newarray:&lt;p&gt;" ;
print_r( $newarray );

$newrow = $row + $newarray;
ksort($newrow);
echo "&lt;p&gt;newrow:&lt;p&gt;" ;
print_r( $newrow );
</code></pre>

Result

<pre><code>row:

Array ( [10] =&gt; Array ( [something] =&gt; 21 ) [5] =&gt; Array ( [something] =&gt; 42 ) )

newarray:

Array ( [0] =&gt; 0 [1] =&gt; 0 [2] =&gt; 0 [3] =&gt; 0 [4] =&gt; 0 [5] =&gt; 0 [6] =&gt; 0 [7] =&gt; 0 [8] =&gt; 0 [9] =&gt; 0 [10] =&gt; 0 )

newrow:

Array ( [0] =&gt; 0 [1] =&gt; 0 [2] =&gt; 0 [3] =&gt; 0 [4] =&gt; 0 [5] =&gt; Array ( [something] =&gt; 42 ) [6] =&gt; 0 [7] =&gt; 0 [8] =&gt; 0 [9] =&gt; 0 [10] =&gt; Array ( [something] =&gt; 21 ) )
</code></pre>

I have an array with these entries: 

<pre><code>$row['10']['something'] = "21";
$row['5']['something'] = "42";
</code></pre>

I want to make a string from index 0 to 10. But only index "5" and "10" are set.
However I want a string like this:

<pre><code>0, 0, 0, 0, 42, 0, 0, 0, 0, 21 
</code></pre>

Currently I am using this:

<pre><code>for($i=0; $i &lt;= 10; $i++) {
 if (!array_key_exists($i, $row))
 $row[$i]['something'] = 0;
 if ($i == 10)
 $string .= $row['10']['something'];
 else
 $string .= $row[$i]['something'].', ';
 }
</code></pre>

But I need it more efficient. I could do array_map and implode but I don't know how to add the <code>0, 0, 0,...</code> I would only get <code>21, 42</code>

To clarify:

I can't overwrite single indexes the array called <code>$row</code> in this example is filled from a sql query. It will completely overwrite an existing array.

PHP: Array add index if not exists

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个包含以下条目的数组：$row['10']['something'] = "21";$row['5']['something'] = "42";我想做一个从索引0到10的字符串，但是只设置了索引"5“和"10”。然而，我想要一个这样的字符串：0, 0, 0, 0, 42, 0, 0, 0, 0, 21 目前我使用的是：for($i=0; $i <= 10; $i++) { if

问PHP:如果不存在，则数组添加索引
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