php man page for ctype_print

CTYPE_PRINT(3)								 1							    CTYPE_PRINT(3)

ctype_print - Check for printable character(s)

SYNOPSIS
       bool ctype_print (string  $text)

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

PARAMETERS
	      o $text
		- The tested string.

RETURN VALUES
	Returns  TRUE  if every character in $text will actually create output (including blanks). Returns FALSE if $text contains control charac-
       ters or characters that do not have any output or control function at all.

EXAMPLES
       Example #1

	      A ctype_print(3) example

	      <?php
	      $strings = array('string1' => "asdf

	", 'string2' => 'arf12', 'string3' => 'LKA#@%.54');
	      foreach ($strings as $name => $testcase) {
		  if (ctype_print($testcase)) {
		      echo "The string '$name' consists of all printable characters.
";
		  } else {
		      echo "The string '$name' does not consist of all printable characters.
";
		  }
	      }
	      ?>

	      The above example will output:

	      The string 'string1' does not consist of all printable characters.
	      The string 'string2' consists of all printable characters.
	      The string 'string3' consists of all printable characters.

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), ctype_punct(3).

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