ctype_punct
Description
Check for any printable character which is not whitespace or an alphanumeric character
Syntax
ctype_punct ( mixed $text ) : bool
Parameters
textThe tested string.
Note: If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative values have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string containing the decimal digits of the integer.
Return
Returns TRUE if every character in text is printable, but neither letter, digit or blank, FALSE otherwise.
Examples
1
<?
$text = "!\"#$%&'()*+,-./:;<=>?@[\]^_`{|}~";
$return = ctype_punct($text);
var_export($return);
?>true
2
<?
for ($i = 0; $i <= 255; ++$i)
{
$return = ctype_punct($i);
if ($return)
{
$character = chr($i);
echo "$i: $character\n";
}
}
?>33: !
34: "
35: #
36: $
37: %
38: &
39: '
40: (
41: )
42: *
43: +
44: ,
45: -
46: .
47: /
58: :
59: ;
60: <
61: =
62: >
63: ?
64: @
91: [
92: \
93: ]
94: ^
95: _
96: `
123: {
124: |
125: }
126: ~
