ctype_print to validate printable characters including space in PHP

$var='Hi Welcome'; // All are printable character(s) except space
$var='Hi \n welcome'; // All or some are NOT printable character(s)

if(ctype_print($var)){
	echo "<b>$var</b> All are printable character(s) except space ";
}else{ 
	echo " <b>$var</b> All or some are NOT printable character(s)";
}

Syntax

bool ctype_print ( string $input_string )

$input_string : String to be checked.

ctype_print() is a PHP filter function checks if all chars in the $input_string are printable characters including space or not. Any thing other than this if present then it returns FALSE.

$str = array('string1' => "12$s", 'string2' => "Hello World", 'string3' => "asdf\n\r\t",'string4' => 43);
foreach ($str as $val => $string) {
if (ctype_print($string)) {
 echo "<p class='text-success'>The string <b>$val</b> consists of all  printable character(s)</p><br>";
}else {
 echo "<p class='text-danger'>The string <b>$val</b> does not consist of all printable character(s)</p><br>";
 }
}

Output is here

The string string1 consists of all  printable character(s)

The string string2 consists of all  printable character(s)

The string string3 does not consist of all printable character(s)

The string string4 does not consist of all printable character(s)

Why the $string4 => 43 is not printable chars in above code ?

The function ctype_print() expects the input to be a string, hence 43 is considered as ASCII 43 ( which is equal to + ).

Difference between ctype_print() and ctype_graph()

$str="Hello World";
echo "output of ctype_print(): ".ctype_print($str);
echo "<br>";
echo "output of ctype_graph(): ".ctype_graph($str);

Output is here

output of ctype_print(): 1
output of ctype_graph():

Check for only alphabetic characters by ctype_alpha() Check for all lower or upper Check for at least one lower case or upper case
ctype()

Subhendu Mohapatra

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ctype_print(): Check for printable character(s)

Difference between ctype_print() and ctype_graph()

Subhendu Mohapatra