Validating numeric values in a string. Why is this condition giving true?

I’m trying to validate string to check is there any numeric value.. but the condition is not giving me expected result. What’s the problem ?

$data = 'String';

$splt_data = str_split($data);
print_r($splt_data);

for ($i = 0; $i < count($splt_data); $i++) {
    for ($x = 0; $x < 10; $x++) {
        if ($splt_data[$i] == $x) {
            echo "<br> The \"$data\" value is containing numeric value.";
            echo "<br>" . $splt_data[$i] . ' and ' . $x;
            exit();
        }
    }
}

>Solution :

If you don’t care about splitting the string and comparing each character, you could use a regex to see if there are any digits in the string:

$data = "String";

if(preg_match("/\\d/", $data)){
    // contains a digit
}