Two ways to delete specific elements in an array in PHP_PHP Tutorial

Method 1:

Copy code The code is as follows:

$arr1 = array( 1,3, 5,7,8);
$key = array_search(3, $arr1);

if ($key !== false)
array_splice($arr1, $key, 1);
var_dump($arr1);
?>

Output:
array(4) { [0]=> int(1) [1]=> int(5) [2]=> int(7) [3]=> int(8) }

Method 2:

Copy code The code is as follows:

$arr2 = array( 1,3, 5,7,8);
foreach ($arr2 as $key=>$value)
{
if ($value === 3)
unset($arr2 [$key]);
}
var_dump($arr2);
?>

Output:
array(4) { [0]=> int(1) [2]=> int(5) [3]=> int(7) [4]=> int(8) }

Summary: You can see that there is a difference between using array_splice() to delete specific values ​​and using unset to delete specific values.

If the array_splice() function is deleted, the index value of the array will also change.

If the unset() function is deleted, the index value of the array will not change.

http://www.bkjia.com/PHPjc/328026.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/328026.htmlTechArticleMethod 1: Copy the code as follows: ?php $arr1 = array(1,3, 5,7,8 ); $key = array_search(3, $arr1); if ($key !== false) array_splice($arr1, $key, 1); var_dump($arr1); ? Output: ...