How to delete specified key in php

php method to delete the specified key: first use the "array_search" function to search according to the value; then press the key to find the location corresponding to the key; finally use the customized "array_remove" method to delete the specified key.

PHP deletes the specified key in the Array array (full version, encapsulated into a function, with test code attached)

Problem background: Arrays are generally stored in key-value storage. Sometimes we need to delete the specified key and corresponding value. But I don’t know why, so many posts are talking about knowing the value and deleting the value, which almost misled me.

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Now I attach the complete version of the code I wrote:

function array_remove($data, $key){
    if(!array_key_exists($key, $data)){
        return $data;
    }
    $keys = array_keys($data);
    $index = array_search($key, $keys);
    if($index !== FALSE){
        array_splice($data, $index, 1);
    }
    return $data;
 
}
$data = array('name'=>'apple','age'=>12,'address'=>'ChinaGuangZhou');
$result = array_remove($data, 'name');
var_dump($result);

Supplementary instructions:

1. In fact, the problem lies in the array_search function. This function searches according to the value and gets the position. If it cannot find it, it returns NULL or false;

2. Therefore, when searching for the key corresponding to the key, When searching for the location, you need to find it in $keys. This is the reason for calling array_keys

3. Because the array_search function may return NULL or false, you must use absolute comparison!

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