(PHP 4 >= 4.0.4, PHP 5)
ctype_graph — Check for any printable character(s) except space
Checks if all of the characters in the provided string, text, creates visible output.
The tested string.
Returns TRUE if every character in text is printable and actually creates visible output (no white space), FALSE otherwise.
Example #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";
}
}
?>
以上例程会输出：
The string 'string1' does not consist of all (visibly) printable characters. The string 'string2' consists of all (visibly) printable characters. The string 'string3' consists of all (visibly) printable characters.