How to remove a key from an array in php

php method to remove a key from an array: 1. Create a PHP sample file; 2. Determine the key of the array element to be deleted; 3. Delete the specified key through the array_diff_key function.

#The operating environment of this article: Windows 7 system, PHP version 7.1, Dell G3 computer.

How to remove a key from an array in php?

array_diff_key() method:

If you know the key of the array element you want to delete, you can use array_diff_key(). You need to enter the key to be deleted in the key value position of the second parameter of the function. The value is not required and can be optional.

<?php
$array = array(0 => "a", 1 => "b", 2 => "c");
$array = array_diff_key($array, [0 => "xy", "2" => "xy"]);
                               //↑           ↑ 你要删除的数组键
print_r($array);
?>

The output result is:

Array (
    [1] => b
)

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