Reverse String – Qawall - The syntax source

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PHP

Write a program to reverse string in php

We can reverse string in php using the php string function strrev() and without using the string function. Let’s check one by one.

Example : string = HELLO WORLD , reverse = DLROW OLLEH

Program 1 : using strrev()

<?php  
     $string = "HELLO WORLD";  
     echo strrev($string);  
?>

Click to know more about strrev()

Output :

Program 2 : Without using strrev()

<?php  
   $string = "HELLO WORLD!";  
   $length = strlen($string);  
   for ($i=($length-1) ; $i >= 0 ; $i--)   
   {  
       echo $string[$i];  
   }  
?>

Logic :

Store the string to a variable
Find the length of the string, this length is used to loop through the string
Start a for loop from $length-1 , the -1 is because php indexing/position is starts from 0 also the loop will be decreased until 0
Print each alphabet according to the position

Click to know more about strlen()