(PHP 4 >= 4.0.4, PHP 5)
ctype_punct — Check for any printable character which is not whitespace or an alphanumeric character
Checks if all of the characters in the provided string, text, are punctuation character.
The tested string.
Returns TRUE if every character in text is printable, but neither letter, digit or blank, FALSE otherwise.
Example #1 A ctype_punct() example
<?php
$strings = array('ABasdk!@!$#', '!@ # $', '*&$()');
foreach ($strings as $testcase) {
if (ctype_punct($testcase)) {
echo "The string $testcase consists of all punctuation.\n";
} else {
echo "The string $testcase does not consist of all punctuation.\n";
}
}
?>
以上例程会输出：
The string ABasdk!@!$# does not consist of all punctuation. The string !@ # $ does not consist of all punctuation. The string *&$() consists of all punctuation.