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.

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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;
}

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