How to delete a certain field in PHP

How to delete a field in a php array: 1. Use the function unset to delete the key of the array element value. The code is [unset($array[1])]; 2. Use the function [array_splice()] , the key of the array is re-indexed, the code is [array_splice($array,1].

Method to delete a field in php array:

unset() method

Note that if you use the unset() method, it will not change other keys. If you want to To rearrange and sort the keys, you can use array_values().

<?php
$array = array(0 => "a", 1 => "b", 2 => "c");
unset($array[1]);
           //↑ 你要删除的数组元素值的键
print_r($array);
?>

Output results:

Array (
    [0] => a
    [2] => c
)

array_splice() method

If you Using the array_splice() method, the keys of the array will be automatically re-indexed, but it will not work for associative arrays. You need to use array_values() to convert the keys to numeric keys.

<?php
$array = array(0 => "a", 1 => "b", 2 => "c");
array_splice($array, 1, 1);
                   //↑ Offset which you want to delete
print_r($array);
?>

Output results:

Array
(
    [0] => a
    [1] => c
)

array_splice() has the same effect as the unset() function in releasing the specified elements of the array.

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