ctype_graph

Description

Returns TRUE if every character in text is printable and actually creates visible output (no white space), FALSE otherwise.

例子 1. A ctype_graph() example <?php $strings = array('string1' => "asdf\n\r\t", 'string2' => 'arf12', 'string3' => 'LKA#@%.54'); foreach ($strings as $name => $testcase) {     if (ctype_graph($testcase)) {         echo "The string '$name' consists of all (visibly) printable characters.\n";     } else {         echo "The string '$name' does not consist of all (visibly) printable characters.\n";     } } ?> This example will output : The string 'string1' does not consist of all printable characters. The string 'string2' consists of all printable characters. The string 'string3' consists of all printable characters.

See also ctype_alnum(), ctype_print(), and ctype_punct().