How to Filter Elements of an Array based on a Condition in PHP - Step by Step Examples

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How to Filter Elements of an Array based on a Condition in PHP ?

Answer

To filter elements of an array based on a condition in PHP, you can use the array_filter function.

✐ Examples

1 Filter Even Numbers

In this example,

We have an array named numbers containing integers.
We define a custom callback function filterEven to filter out even numbers.
We apply array_filter with our custom callback to get the filtered array.
We print the filtered array to demonstrate the filtering.

PHP Program

<?php
$numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
function filterEven($num) {
    return $num % 2 === 0;
}
$evenNumbers = array_filter($numbers, 'filterEven');
print_r($evenNumbers);
?>

Output

Array
(
    [1] => 2
    [3] => 4
    [5] => 6
    [7] => 8
    [9] => 10
)

2 Filter Strings by Length

In this example,

We have an array named words containing strings.
We define a custom callback function filterByLength to filter strings by their length.
We apply array_filter with our custom callback to get the filtered array.
We print the filtered array to demonstrate the filtering.

PHP Program

<?php
$words = ['apple', 'banana', 'cherry', 'date', 'fig'];
function filterByLength($word) {
    return strlen($word) > 5;
}
$filteredWords = array_filter($words, 'filterByLength');
print_r($filteredWords);
?>

Output

Array
(
    [1] => banana
    [2] => cherry
)

Summary

In this tutorial, we learned How to Filter Elements of an Array based on a Condition in PHP language with well detailed examples.

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How to Filter Elements of an Array based on a Condition in PHP - Step by Step Examples

How to Filter Elements of an Array based on a Condition in PHP ?

Answer

✐ Examples

1 Filter Even Numbers

PHP Program

Output

2 Filter Strings by Length

PHP Program

Output

Summary

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