Funcții Ctype
PHP Manual

ctype_xdigit

(PHP 4 >= 4.0.4, PHP 5)

ctype_xdigit Check for character(s) representing a hexadecimal digit

Descrierea

bool ctype_xdigit ( string $text )

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

Parametri

text

The tested string.

Valorile întoarse

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.

Exemple

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";
    }
}
?>

Exemplul de mai sus va afișa:

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.

Vedeți de asemenea


Funcții Ctype
PHP Manual