How to delete array elements with specified subscript in php

You can use the unset() function in PHP to delete the array element of the specified subscript, the syntax format is "unset($arr[specified subscript]);". The unset() function allows you to cancel elements in an array, but the array does not rebuild the index. You can use the array_values() function to reorder the index.

The operating environment of this tutorial: windows7 system, PHP8 version, DELL G3 computer

PHP deletes the element with the specified subscript in the array

If you want to delete an element in the array, you can use unset().

The unset() function allows you to cancel elements in an array, but the array will not re-index, that is, the original index will be maintained, because the index in PHP has a special meaning. If you want to reorder other keys, you can use array_values().

Example:

<?php
$arr = array(1 => &#39;one&#39;, 2 => &#39;two&#39;, 3 => &#39;three&#39;);
echo &#39;<pre class="brush:php;toolbar:false">&#39;;

//删除下标为2的元素
unset($arr[2]);
print_r($arr);

//使用array_values()重新建立索引
$aar = array_values($arr);
print_r($aar);
?>

Output result:

Array
(
    [1] => one
    [3] => three
)
Array
(
    [0] => one
    [1] => three
)

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