Q:

PHP program to check whether given number is palindrome or not

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mahmoud2506
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2022-05-25
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Given a number and we have to check whether it is palindrome or not using PHP program.

Palindrome number

A number which is equal to its reverse number is said to be a palindrome number.

Example:

    Input:
    Number: 12321

    Output:
    It is palindrome number

    Explanation:
    Number is 12321 and its reverse number is 12321, 
    both are equal. Hence, it is a palindrome number.

 

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mahmoud2506
2022-05-25
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Program:

<?php
    //function: isPalindrome
    //description
    function isPalindrome($number){
        //assign number to temp variable
        $temp = $number;
        //variable 'sum' to store reverse number
        $sum = 0;
        
        //loop that will extract digits from the last
        //to make reverse number
        while(floor($temp)){
            $digit = $temp % 10;
            $sum = $sum*10 + $digit;
            $temp = $temp/10;
        }
        //if number is equal to its reverse number
        //then it will be a palindrome number
        if($sum == $number)
            return 1;
        else
            return 0;
    }
    
    //Main code to test above function
    $num = 12321;
    if(isPalindrome($num))
        echo($num . " is a palindrome number");
    else
        echo($num . " is not a palindrome number");
?>

Output

12321 is a palindrome number

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