ctype
PHP Manual

ctype_xdigit

(PHP 4 >= 4.0.4, PHP 5)

ctype_xdigit — Check for character(s) representing a hexadecimal digit

Beskrivelse

bool ctype_xdigit ( string $text )

Checks if all of the characters in the provided string, text , are hexadecimal 'digits'.

Parameterliste

text

The tested string.

Returneringsværdier

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.

Eksempler

Example#1 A ctype_xdigit() example

<?php
$strings 
= array('AB10BC99''AR1012''ab12bc99');
foreach (
$strings as $testcase) {
    if (
ctype_xdigit($testcase)) {
        echo 
"The string $testcase consists of all hexadecimal digits.\n";
    } else {
        echo 
"The string $testcase does not consist of all hexadecimal digits.\n";
    }
}
?>

Ovenstående eksempel vil udskrive:

The string AB10BC99 consists of all hexadecimal digits.
The string AR1012 does not consist of all hexadecimal digits.
The string ab12bc99 consists of all hexadecimal digits.

Se også


ctype
PHP Manual