php method to remove empty elements in an array: 1. Use the "function myfunction($v) {...}" method to remove empty elements; 2. Use "foreach ($urlArr as $key => ; $val) {...}" method removes empty elements from the array.
The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer
How to remove empty elements in an array in php ?
How to remove empty elements from PHP array
Method 1 to remove empty elements: (Keep the key value unchanged)
Original array:
<?php Array( [0] => sdfdsdsdsfrrrrrrr [1] => fdsfdsdsfds [2] => fdsfdsdsfdsds [3] => fdsdsfdsfds [4] => [5] => [6] => [7] => fdsfdsfdsfds [8] => fdsfdsfdsfdsfdsfsd [9] => ssssssss [10] => [11] => sssssssssssssssssssss) ?>
Array after processing
<?php Array( [0] => sdfdsdsdsfrrrrrrr [1] => fdsfdsdsfds [2] => fdsfdsdsfdsds [3] => fdsdsfdsfds [7] => fdsfdsfdsfds [8] => fdsfdsfdsfdsfdsfsd [9] => ssssssss [11] => sssssssssssssssssssss) ?>
Usage method:
<?php function myfunction($v) { if ($v != "") { return true; } return false; } print_r(array_filter($urlArr, "myfunction")); ?>
Remove empty elements Method 2: (key value auto-increment)
Original array:
<?php Array ( [0] => sdfdsdsdsfrrrrrrr [1] => fdsfdsdsfds [2] => fdsfdsdsfdsds [3] => fdsdsfdsfds [4] => [5] => [6] => [7] => fdsfdsfdsfds [8] => fdsfdsfdsfdsfdsfsd [9] => ssssssss [10] => [11] => sssssssssssssssssssss )
Processing After the array:
Array ( [0] => sdfdsdsdsfrrrrrrr [1] => fdsfdsdsfds [2] => fdsfdsdsfdsds [3] => fdsdsfdsfds [4] => fdsfdsfdsfds [5] => fdsfdsfdsfdsfdsfsd [6] => ssssssss [7] => sssssssssssssssssssss )
Usage:
$arr = array(); foreach ($urlArr as $key => $val) { if (empty($val)) { continue; } $arr[] = $val; }
Recommended learning: "PHP Video Tutorial"
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