PHP的 foreach each list-PHP Tutorial-php.cn

PHP的 foreach each list

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Release： 2023-03-24 20:06:01

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This article mainly introduces the foreach each list about PHP, which has a certain reference value. Now I share it with everyone. Friends in need can refer to it

<?php
 
/*foreach (函数名 as 地址下标 => 该下标对应的数值)
$arr = [&#39;a&#39;,&#39;b&#39;,&#39;c&#39;,&#39;d&#39;,&#39;e&#39;,&#39;f&#39;,&#39;g&#39;];
foreach( $arr as $key=>$val) {
var_dump($key.&#39;--------&#39;.$val.&#39;<br  />&#39;);

}

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The use of list is similar to directly copying the value in the array to the variable of the list, and then outputting

  $arr = [&#39;a&#39;,&#39;b&#39;,&#39;c&#39;,&#39;d&#39;,&#39;e&#39;,&#39;f&#39;,&#39;g&#39;];

   list($a,$b,$c,$d,$e) = $arr;

   var_dump($a,$b,$c,$d,$e);

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Each is equivalent It is used to read by row, but this is to read the data corresponding to the address one by one

  $arr = [&#39;abc&#39;,&#39;b&#39;,&#39;c&#39;,&#39;d&#39;,&#39;e&#39;,&#39;f&#39;,&#39;g&#39;];
  var_dump(each($arr));
    var_dump(each($arr));
  var_dump(each($arr));
    var_dump(each($arr));
  var_dump(each($arr));

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This is a combination of list and each, similar to the use of foreach When the output address is the same as the corresponding value

 $arr = [&#39;abc&#39;,&#39;b&#39;,&#39;c&#39;,&#39;d&#39;,&#39;e&#39;,&#39;f&#39;,&#39;g&#39;];
list($key,$val) = each($arr);
var_dump($key,$val);
    list($key,$val) = each($arr);
var_dump($key,$val);
list($key,$val) = each($arr);
var_dump($key,$val);
list($key,$val) = each($arr);
var_dump($key,$val);
?>
*/

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