ctype_punct()

ctype_punct() — Check for any printable character which is not whitespace or an alphanumeric character.

ctype_punct() — Checks if all of the characters in the provided string, text, are punctuation character.

Inputs: text: The tested string. If an int 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.

Returns: Returns true if every character in text is printable, but neither letter, digit or blank, false otherwise. When called with an empty string the result will always be false.