php man page for ctype_punct

CTYPE_PUNCT(3)								 1							    CTYPE_PUNCT(3)

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

SYNOPSIS
       bool ctype_punct (string  $text)

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

PARAMETERS
	      o $text
		- The tested string.

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

EXAMPLES
       Example #1

	      A ctype_punct(3) example

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

	      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.

NOTES
       Note

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

SEE ALSO
       ctype_cntrl(3), ctype_graph(3).

PHP Documentation Group 													    CTYPE_PUNCT(3)