PHP | ctype_print() Function

Last Updated : 06 Feb, 2023

The ctype_print() Function in PHP used to check each and every character of a string are visible or not. If all characters of string are visible then returns TRUE , else if there are any control character then return FALSE. Control Character: A character that does not represent a printable character but serves to initiate a particular action. for example '\n' is a control character which is not printable but perform action "Next Line" Syntax:

ctype_print(string text)

Parameter Used:

$text : The tested string. Its a mandatory parameter.

Return Values: This function return TRUE if all characters of string are printable(not containing any control character). And return FALSE if string contains any control character. Examples:

Input  : Geeks for geeks article
Output : Geeks for geeks article -->Yes visible

Explanation : The string contains three blank space 
             and the function returns TRUE. 

Input  : \tgfg\n
Output :     gfg
--> No visible

Explanation : '\t' and '\n' are control character .
            Then the function returns False.

Program: 1

<?php
// PHP program to illustrate 
// ctype_print() function 

$string = 'GFG A Computer Science Portal';

// Checking above given strings 
// by used of ctype_print() function .
if (ctype_print($string)) {
    
    // if true then return Yes
    echo "$string: Yes visible\n";
} else {
    
    // if False then return No
    echo "$string: No visible\n";
}
?>

Output:

GFG A Computer Science Portal: Yes visible

Program: 2 Drive a code of ctype_print() function where input will be integer, symbols in array of strings.

<?php
// PHP program to illustrate
// ctype_print() function 

$strings = array(
    "GeeksforGeeks",
    "GFG2018",
    "\nComputerScience",
    "G 4 G",
    "@#$$.&*()_+;?~",
    "78 96 . 90"
);

// Checking above array of strings 
// by used of ctype_print() function.
foreach ($strings as $str) {
    
    if (ctype_print($str)) {
        
        // if true then return Yes
        echo "$str:   (Yes visible)\n";
    } else {
        // if False then return No
        echo "$str:   (No visible)\n";
    }
}

?>

Output:

GeeksforGeeks:   (Yes visible)
GFG2018:   (Yes visible)

ComputerScience:   (No visible)
G 4 G:   (Yes visible)
@#$$.&*()_+;?~:   (Yes visible)
78 96 . 90:   (Yes visible)

References : http://php.net/manual/en/function.ctype-print.php