IntlChar::iscntrl
(PHP 7, PHP 8)
IntlChar::iscntrl — Check if code point is a control character
Description
public static IntlChar::iscntrl(int|string
$codepoint): ?boolDetermines whether the specified code point is a control character.
A control character is one of the following:
- ISO 8-bit control character (U+0000..U+001f and U+007f..U+009f)
IntlChar::CHAR_CATEGORY_CONTROL_CHAR(Cc)IntlChar::CHAR_CATEGORY_FORMAT_CHAR(Cf)IntlChar::CHAR_CATEGORY_LINE_SEPARATOR(Zl)IntlChar::CHAR_CATEGORY_PARAGRAPH_SEPARATOR(Zp)
Parameters
-
codepoint -
The int codepoint value (e.g.
0x2603for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g."\u")
Return Values
Returns true if
codepoint is a control character, false if not. Returns null on failure.
Examples
Example #1 Testing different code points
<?php
var_dump(IntlChar::iscntrl("A"));
var_dump(IntlChar::iscntrl(" "));
var_dump(IntlChar::iscntrl("\n"));
var_dump(IntlChar::iscntrl("\u"));
?>
The above example will output:
bool(false) bool(false) bool(true) bool(true)
See Also
- IntlChar::isprint() - Check if code point is a printable character
IntlChar::PROPERTY_DEFAULT_IGNORABLE_CODE_POINT
Here you can write a comment
There are no comments available yet.
