Ctype Функции
PHP Manual

ctype_alnum

(PHP 4 >= 4.0.4, PHP 5)

ctype_alnumCheck for alphanumeric character(s)

Описание

bool ctype_alnum ( string $text )

Checks if all of the characters in the provided string, text , are alphanumeric. In the standard C locale letters are just [A-Za-z].

Параметри

text

The tested string.

Връщани стойности

Returns TRUE if every character in text is either a letter or a digit, FALSE otherwise.

Примери

Example #1 A ctype_alnum() example (using the default locale)

<?php
$strings 
= array('AbCd1zyZ9''foo!#$bar');
foreach (
$strings as $testcase) {
    if (
ctype_alnum($testcase)) {
        echo 
"The string $testcase consists of all letters or digits.\n";
    } else {
        echo 
"The string $testcase does not consist of all letters or digits.\n";
    }
}
?>

Примерът по-горе ще изведе:

The string AbCd1zyZ9 consists of all letters or digits.
The string foo!#$bar does not consist of all letters or digits.

Вж. също


Ctype Функции
PHP Manual