ctype_punct

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

Check for any printable character which is not whitespace or an alphanumeric character

bool ctype_punct ( string $text )

Checks if all of the characters in the provided string, text, are punctuation character.

Parameters:

text

The tested string.

Returns:

Returns TRUE if every character in text is printable, but neither letter, digit or blank, FALSE otherwise.

Notes:

If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative values have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string containing the decimal digits of the integer.

Examples:

A ctype_punct() example

<?php
$strings = array('ABasdk!@!$#', '!@ # $', '*&$()');
foreach ($strings as $testcase) {
    if (ctype_punct($testcase)) {
        echo "The string $testcase consists of all punctuation.\n";
    } else {
        echo "The string $testcase does not consist of all punctuation.\n";
    }
}
?>

The above example will output:

The string ABasdk!@!$# does not consist of all punctuation.
The string !@ # $ does not consist of all punctuation.
The string *&$() consists of all punctuation.