PHP. Учебник. 2005

ctype_alnum

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ctype_alnum

(PHP 4 >= 4.0.4, PHP 5)ctype_alnum -- Check 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] and the function is equivalent to preg_match('/^[a-z0-9]*$/i', $text).

Список параметров

-

text

- The tested string.

Возвращаемые значения

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

Примеры

-

Пример 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";
}
}
?>

Результат выполнения данного примера:
The string AbCd1zyZ9 consists of all letters or digits.

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

Смотрите также

-

ctype_alpha()
ctype_digit()
setlocale()

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