Check for character(s) representing a hexadecimal digit with ctype_xdigit in PHP
Description
The following code shows how to check for character(s) representing a hexadecimal digit with ctype_xdigit.
Example
/*from w w w. j ava 2 s. co m*/
<?php
$strings = array('QQQQQ10WWWW99', 'QQQQ1012', 'ab12bc99');
foreach ($strings as $testcase) {
if (ctype_xdigit($testcase)) {
echo "The string $testcase consists of all hexadecimal digits.\n";
} else {
echo "The string $testcase does not consist of all hexadecimal digits.\n";
}
}
?>
The code above generates the following result.
