(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";
}
}
?>
上例将输出：
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.