Reverse number Program in PHP


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Reverse number Program in PHP

strrev() function is used to reverse any given number in php, but here we perform this operation without using strrev() function and using strrev() function.

Reverse number without using library function Program in PHP

<?php

$num = 2039;
$revnum = 0;
while ($num != 0)
{
$revnum = $revnum * 10 + $num % 10;
//below cast is essential to round remainder towards zero
$num = (int)($num / 10); 
}
 
echo "Reverse number: $revnum";

?>

Output

	
Reverse number: 9302

Reverse number Program in PHP

<?php

function reverse_number($number)
{
    
   /* Typecast the number into string. */
 
    $snum = (string) $number;
 
    /* Reverse the string. */
 
    $revstr = strrev($snum);
 
    /* Typecast string into int. */
 
    $reverse = (int) $revstr;
 
     return $reverse;
}
 
 echo reverse_number(2039);

?>

Output

	
9302

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