How to use a Loop and unset() Function In PHP
You can use a foreach loop to iterate over the elements to be removed and use unset() to remove them from the original array.
Example: This example shows the use of the above-explained approach.
<?php
// Declare an Array
$arr = [1, 2, 3, 4, 5, 6];
// Declare an array containing
// elements that need to remove
$remove = [2, 4, 6];
// Remove elements using unset
foreach ($remove as $value) {
if (($key = array_search($value, $arr)) !== false) {
unset($arr[$key]);
}
}
// Reindex the array
$arr = array_values($arr);
print_r($arr);
?>
Output
Array
(
[0] => 1
[1] => 3
[2] => 5
)
Explanation:
- $arr is the original array.
- $remove contains the elements to be removed.
- The foreach loop iterates over $remove, and for each element, array_search($value, $arr) finds the key, and unset($arr[$key]) removes the element.
- array_values($arr) reindexes the array to have sequential keys.
How to Remove Multiple Elements from an Array in PHP?
Given an array containing some elements, the task is to remove some elements from the array in PHP.
Below are the approaches to remove multiple elements from an array in PHP:
Table of Content
- Using array_diff() Function
- Using array_filter() Function
- Using a Loop and unset() Function
- Using array_diff_key() Function
Contact Us