How to use key to remove specified elements from an array in php

Method: 1. Use "array_keys(array)" to return a new array containing the array key name; 2. Use "array_search(key, new array)" to return the key name of the specified key in the new array; 3. . Use "array_splice(array, specified key name, 1)" to remove the specified element.

The operating environment of this article: Windows 10 system, PHP version 7.1, Dell G3 computer.

How to use key in php to remove specified elements from an array

First use the array_keys function and array_search function to obtain the position of the specified key in the array

Then use the array_splice function to delete Just specify the element.

Detailed introduction:

array_keys() function returns a new array containing all the key names in the array.

If the second parameter is provided, only the key name with the key value is returned.

array_search() function searches for a key value in the array and returns the corresponding key name.

array_splice() function removes the selected element from an array and replaces it with a new element. This function will also return the array containing the removed elements.

The example is as follows:

<?php
$a=array("a"=>"red","b"=>"green","c"=>"blue");
$b=array_keys($a);
$c=array_search("b",$b);
array_splice($a, $c, 1);
print_r($a);
?>

Output result:

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