PHP - Function ctype_xdigit()

Syntax

ctype_xdigit ( $text );

Definition and Usage

This function checks if all of the characters in the provided string, text, are hexadecimal 'digits'.

Parameters

Return Value

It returns TRUE if every character in text is a hexadecimal 'digit', that is a decimal digit or a character from [A-Fa-f], FALSE otherwise.

Example

Try out following example −

<?php
   $strings = array('ABCDEF', 'SAI!@#$', 'ab12bc99');
   
   foreach ($strings as $test) {
      if (ctype_xdigit($test)) {
         echo "$test consists of all hexadecimal digits. \n";
      }else {
         echo "$test does not have all hexadecimal digits. \n";
      }
   }
?> 

This will produce the following result −

ABCDEF consists of all hexadecimal digits.
SAI!@#$ does not have all hexadecimal digits.
ab12bc99 consists of all hexadecimal digits.