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ctype_alnum (PHP 4 >= 4.0.4, PHP 5) ctype_alnum -- Check for alphanumeric character(s) Descriptionbool 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).
Return Values
Returns TRUE if every character in text is either
a letter or a digit, FALSE otherwise.
Examples
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 $testcase does not consist of all letters or digits.\n";
}
}
?> |
The above example will output: The string AbCd1zyZ9 consists of all letters or digits.
The string foo!#$bar does not consists of all letters or digits. |
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ctype
