strrev(): PHP String Reverse

Reverse a simple string

strrev() reverses a string byte by byte. It is straightforward for simple ASCII text but is not multibyte-aware for general UTF-8 text.

$text = 'plus2net';
echo strrev($text); // ten2sulp

Start with this current pattern. The examples below are retained, corrected where necessary, and expanded for additional variations and output.

echo strrev('plus2net'); //ten2sulp

Syntax

echo strrev($input_string);

$input_string: Input string to be reversed
Output is the string after reversing input string.

The original ( input string ) remains same.

We can reverse any string by applying strrev() function.
Here is the code

$st="This is a test";
echo "The string = ".$st."<br>";
$st=strrev($st);
echo "The new string after applying the strrev function = ".$st."<br>";

Printing the string in reverse without using strrev() function.

Here is the code.

<?Php
$st="Hello world";
//echo $st[4];
$length=strlen($st);
for($i=$length-1;$i>=0;$i--){
echo $st[$i];
}
?>

Output is here

dlrow olleH

This function support utf-8 encoding and does not work with unicode strings.

Palindrome

A string is palindrome if reverse of the string is same as main string.
Check the string or number is Palindrome or not in PHP

Example 2: Reversing a String Without Affecting Special Characters

Using *strrev()* can reverse strings, but it also affects special characters. Here's how to reverse a string while preserving HTML entities like < and >:

$str = "Hello <World>";
$reversed_str = htmlspecialchars(strrev(htmlspecialchars_decode($str)));
echo $reversed_str; 
// Outputs: >dlroW< olleH

Example 3: Reversing Only Words in a Sentence

This example demonstrates reversing only the words while keeping their order intact:

$sentence = "PHP is great";
$reversed_words = implode(' ', array_reverse(explode(' ', $sentence)));
echo $reversed_words; 
// Outputs: great is PHP

STRING REFERENCE strlen(): Length of the string

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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huzoor	23-04-2012
Nice Collection.. I feel very happy