PHP ctype_print() Function Usage and Example

PHP Ctype Function Manual

The ctype_print() function performs printable character detection, checking if all characters in the string are printable characters.

Syntax

ctype_print( $text );

Definition and Usage

This function checks if all characters in the provided string are printable.

Parameter

Return value

If all characters in the text can be actually output in the current language environment (including whitespace), it returns TRUE; if the text contains control characters or strings that will not output anything, it returns FALSE.

Online Example

<?php
　　　$strings = array('asdf\n\r\t', "asdf\n\r\t", 'k211', "fooo#int%@")
　　　
　　　foreach ($strings as $test) {
　　　　　　if (ctype_print($test)) {
　　　　　　　　　echo "$test All are printable characters \n";
　　　　　　}else {
　　　　　　　　　echo "$test Contains non-printable characters \n";
　　　　　　}
　　　}
?>

Output result:

asdf\n\r\t All are printable characters　
asdf
	　Contains non-printable characters　
k211　All are printable characters　
fooo#int%@ All are printable characters

　 　PHP Ctype Function Manual