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ctype_alnum

Manual PHP
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ctype_alnum

(PHP 4 >= 4.0.4, PHP 5)

ctype_alnum -- Check for alphanumeric character(s)

Description

bool ctype_alnum ( string text)

Returns TRUE if every character in text is either a letter or a digit, FALSE otherwise. In the standard C locale letters are just [A-Za-z] and the function is equivalent to preg_match('/^[a-z0-9]*$/i', $text).

Exemplu 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";
    }
}
?>

This example will output :

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

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Character Type Functions	Sus	ctype_alpha

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ctype_alnum

Description

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