IntlChar::iscntrl
Check if code point is a control character
Description
public static bool IntlChar::iscntrl
( mixed $codepoint
)
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 integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")
Return Values
Returns TRUE if
codepoint is a control character, FALSE if not.
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{200e}"));
?>
The above example will output:
bool(false)
bool(false)
bool(true)
bool(true)
See Also
- IntlChar::isprint
IntlChar::PROPERTY_DEFAULT_IGNORABLE_CODE_POINT