How to remove empty elements from array in php

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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