Returns TRUE if every character in text is a decimal digit, FALSE otherwise.
Example 1. A ctype_digit() 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"; } } ?>
This example will output :
The string 1820.20 does not consists of all digits. The string 10002 consists of all digits. The string wsl!12 does not consists of all digits.
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