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PHP Program to Print Even Length Words in a String

Last Updated : 23 Jul, 2025
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This article will show you how to print even-length words in a string using PHP. Printing even-length words from a given string is a common task that can be approached in several ways.

Table of Content

Using explode() and foreach() Functions

The explode() function can be used to split the string into an array of words, and then a foreach loop can be employed to filter and print the words with an even length.

PHP 
<?php 

function EvenLengthWords($str) { 
	
	// Split the string into an 
	// array of words 
	$words = explode(' ', $str); 

	// Iterate through each word and 
	// print if it has an even length 
	foreach ($words as $word) { 
		if (strlen($word) % 2 === 0) { 
			echo $word . " "; 
		} 
	} 
} 

// Driver code 
$str = "Welcome to Geeks for Geeks, A computer science portal"; 

EvenLengthWords($str); 

?>

Output
to Geeks, computer portal

Using array_filter() and strlen() Functions

The array_filter() function can be utilized along with a custom callback function to filter out the words with an even length.

PHP 
<?php 

function isEvenLength($word) { 
	return strlen($word) % 2 === 0; 
} 

function EvenLengthWords($str) { 
	
	// Split the string into an 
	// array of words 
	$words = explode(' ', $str); 

	// Use array_filter to keep only 
	// even-length words 
	$evenLengthWords = array_filter($words, 'isEvenLength'); 

	// Print the even-length words 
	echo implode(' ', $evenLengthWords); 
} 

// Driver code 
$str = "Welcome to Geeks for Geeks, A computer science portal"; 

EvenLengthWords($str); 

?>

Output
to Geeks, computer portal

Using preg_split() and array_filter() Functions

The preg_split() function can be employed to split the string using a regular expression, and then array_filter() can be used to filter out words with even lengths.

PHP 
<?php 
function EvenLengthWords($str) { 
	
	// Split the string into an array of 
	// words using a regular expression 
	$words = preg_split('/\s+/', $str); 

	// Use array_filter to keep only 
	// even-length words 
	$evenLengthWords = array_filter($words, 
	function ($word) { 
			return strlen($word) % 2 === 0; 
		}); 

	// Print the even-length words 
	echo implode(' ', $evenLengthWords); 
} 

// Driver code 
$str = "Welcome to Geeks for Geeks, A computer science portal"; 

EvenLengthWords($str); 

?>

Output
to Geeks, computer portal

Using str_word_count() and array_map() Functions

Another approach to print even-length words from a given string is by using the str_word_count() function to split the string into an array of words, and then using the array_map() function to filter and print the even-length words.

Example: This method provides another clean and efficient way to print even-length words from a string, showcasing the versatility of PHP's array and string handling functions.

PHP 
<?php
function printEvenLengthWords($inputString) {
    // Split the string into an array of words
    $words = str_word_count($inputString, 1);
    
    // Filter and print even-length words
    array_map(function($word) {
        if (strlen($word) % 2 == 0) {
            echo $word . "\n";
        }
    }, $words);
}

// Sample usage
$inputString = "This is a simple test string";
printEvenLengthWords($inputString);

?>

Output
This
is
simple
test
string



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