How to delete specified keys in php array

php method to delete the specified key of the array: first create a PHP code sample file; then define an "array_remove" method; finally use "array_key_exists", "array_search" and other functions to delete the specified key of the array.

PHP deletes the key specified in the Array array

/**
 * php除数组指定的key值(直接删除key值实现)
 * @param unknown $data
 * @param unknown $key
 * @return unknown
 */
function array_remove($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;
 
}
 
/**
 * php除数组指定的key值(通过直接重新组装一个数组)
 * @param unknown $data
 * @param unknown $key
 * @return unknown
 */
function array_remove1($data,$delKey) {
$newArray = array();
if(is_array($data)) {
foreach($data as $key => $value) {
if($key !== $delKey) {
$newArray[$key] = $value;
}
}
}else {
$newArray = $data;
}
return $newArray;
}
 
$data = array('apple','address','ChinaGuangZhou');
$result = array_remove($data, 'name');
$result1 = array_remove1($data, 'name');
print_r($result);
print_r($result1);

Supplementary instructions:

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

2. Therefore, when searching for the position corresponding to the key by key, 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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