How to delete elements in a two-dimensional array in php
php method to delete elements in a two-dimensional array: You can use the array function array_splice to delete, such as [array_splice($arr, $index, 1);]. The array_splice function removes specified elements from an array and replaces them with new elements.

array_splice() function removes the selected element from an array and replaces it with a new element. The function will also return an array of removed elements.
(Video tutorial recommendation: php video tutorial)
Syntax:
array_splice(array,start,length,array)
Tips: If the function does not remove any elements (length=0) , the substitution array will be inserted from the position of the start parameter.
Note: Key names in the replacement array are not retained.
Code sample:
/**
* 根据key删除数组中指定元素
* @param array $arr 数组
* @param string/int $key 键(key)
* @return array
*/
private function array_remove_by_key($arr, $key) {
if(!array_key_exists($key, $arr)) {
return $arr;
}
$keys = array_keys($arr);
$index = array_search($key, $keys);
if($index !== FALSE) {
array_splice($arr, $index, 1);
}
return $arr;
}Related recommendations:php training
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