PHP – Check for Numeric Character(s)

The given PHP example helps you to check a value either it contain numerice characters or not.
Returns TRUE if every character in the string text is a decimal digit, FALSE otherwise. 

Code Example:

<?php
$strings = array('1820.20', '10002', 'wsl!12');
foreach ($strings as $testcase) {
    if (ctype_digit($testcase)) {
        echo "The string $testcase consists of all digits.\n";
    } else {
        echo "The string $testcase does not consist of all digits.\n";
    }
}
/*
The string 1820.20 does not consist of all digits.
The string 10002 consists of all digits.
The string wsl!12 does not consist of all digits.
*/
?>