PHP | ctype_graph() Function

PHP ctype_graph() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP ctype_graph() Function.

The PHP ctype_graph() function checks if all the characters in the given string, text, creates a visible output.


Following below is the syntax to use this function -

ctype_graph ( $text );

Parameter Details

Sr.NoParameters & Description


The tested string.

Return Value

This built-in PHP function returns TRUE if every character in the text is printable and creates visible output (no whitespace), else FALSE.


Try out the below example -

   $strings = array('asdf\n\r\t', 'arf12', 'LKA#@%.54');
   foreach ($strings as $test) {
      if (ctype_graph($test)) {
         echo "$test consists of all (visibly) printable characters \n";
      }else {
         echo "$test does not have all (visibly) printable characters. \n";


When the above code is executed, it will produce the following result -

asdf\n\r\t consists of all (visibly) printable characters.
arf12 consists of all (visibly) printable characters
LKA#@%.54 consists of all (visibly) printable characters

Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the PHP ctype_lower() Function.

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