PHP - Function ctype_digit()

Syntax

ctype_digit ( $text );

Definition and Usage

It checks if all of the characters in the provided string, text, are numerical. It checks only 1...9

Parameters

Return Value

It returns TRUE if every character in text is a decimal digit, FALSE otherwise.

Example

Try out following example −

<?php
   $strings = array('122.50', '1004', 'foo!#$bar');
   
   foreach ($strings as $test) {
      if (ctype_digit($test)) {
         echo "$test consists of all digits. \n";
      }else {
         echo "$test does not have all digits. \n";
      }
   }
?> 

This will produce the following result −

122.50 does not have all digits
1004 consists of all digits
foo!#$bar does not have all digits