PHP | ctype_space() Function

PHP | ctype_xdigit() Function

Last Updated : 05 Jun, 2018

The ctype_xdigit() function in PHP used to check each and every character of string/text are hexadecimal digit or not. It return TRUE if all characters are hexadecimal otherwise return FALSE . Syntax :

ctype_xdigit(string text)

Parameters Used:

text : It is mandatory parameter which specifies the tested string.

Return Values: It returns TRUE if all characters of the string are hexadecimal otherwise return FALSE. Examples:

Input  :  ABCDEF0123
Output :  Yes

Input  : GFG2018
Output : No

Note :  It checking decimal digit or a character from [A-F, a-f].

Below programs illustrate the ctype_xdigit() function. Program: 1

PHP

<?php
// PHP program to check given string is 
// Hexadecimal character or not

$string = 'ABab012';

// Checking above string by using
// of ctype_xdigit() function.
if ( ctype_xdigit($string)) {
        
    // if true then return Yes
    echo "Yes \n";

} else {

    // if False then return No
    echo "No \n";
}
?>

Output:

Yes

Program: 2 Take one more example ctype_xdigit() function to check how it work when input contains uppercase lowercase and symbol character by using input as array of string.

PHP

<?php
// PHP program to check given string is 
//Hexadecimal character or not

$strings = array(
    'ABCDEF',
    'abcdef',
    '0123456789X',
    '0123456789',
    'Gg@(*&)',
    'GFG'
);

// Checking above given strings 
//by used of ctype_xdigit() function .
foreach ($strings as $test) {
    
    if (ctype_xdigit($test)) {
         echo "Yes \n";
    } else {
         echo "No \n";
    }
}

?>

Output:

Yes 
Yes 
No 
Yes 
No 
No

References : http://php.net/manual/en/function.ctype-xdigit.php

PHP | ctype_space() Function

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