This article mainly introduces the PHP difference operation function array_diff and array traversal. Interested friends can refer to it. I hope it will be helpful to everyone.
The example of this article describes the method of deleting elements based on the element value in PHP associative array, as follows:
<?php $array1 = array("a" => "green", "red", "blue", "red"); $array2 = array("b" => "green"); $result = array_diff($array1, $array2); //这样就相当于删除$array1里的值为"green"的元素。 print_r($result); ?>
There is another method, which is more complicated than the above, but the effect is the same:
function removeArrayElement(&$ar,$val) { $tmp = array(); foreach($ar as $k => $arc) { if($arc!=$val) { $tmp[$k]=$arc; } } $ar = $tmp; unset($tmp); }
Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.
Related recommendations:
php Unordered Tree Implementation Skills
php Unordered Tree Implementation Skills
php process control and mathematical operations
The above is the detailed content of PHP difference operation function array_diff and array traversal. For more information, please follow other related articles on the PHP Chinese website!