(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 $testcase does not consist of all punctuation.\n";
}
}
?>
上例将输出：
The string ABasdk!@!$# does not consist of all punctuation. The string !@ # $ does not consist of all punctuation. The string *&$() consists of all punctuation.