Check for alphanumeric character(s) with ctype_alnum in PHP
Description
The following code shows how to check for alphanumeric character(s) with ctype_alnum.
Example
//from www . j a v a 2 s . c o m
<?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 code above generates the following result.
