PHP ctype_graph() Function Usage and Example

PHP Ctype Function Manual

The ctype_graph() function performs printable string detection, excluding spaces

Syntax

ctype_graph(\$text);

Definition and Usage

　Check if the characters output inside the provided text are all visible.

Parameter

Return Value

If each character in the text is printable and actually creates visible output (without spaces), it returns TRUE; otherwise, it returns FALSE.

Online Example

<?php
　　　\$strings = array('string1' => "asdf\n\r\t", 'string2' => 'arf12', 'string3' => 'LKA#@%.54');　　　
　　　foreach (\$strings as \$test) {
　　　　　　if (ctype_graph(\$test)) {
　　　　　　　　　echo "\$test consists of visible and printable characters\n";
　　　　　　}else {
　　　　　　　　　echo "\$test contains invisible characters.\n";
　　　　　　}
　　　}
?>

Output result:

asdf
	　Contains invisible characters.　
arf12　Consisting of visible and printable characters　
LKA#@%.54　Consisting of visible and printable characters

　 　PHP Ctype Function Manual