IntlChar::iscntrl
PHP function
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(PHP 7, PHP 8)
Check if code point is a control character
Description
IntlChar::iscntrl(int|string $codepoint): bool|null
Determines 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
codepointParameter
Return Values
Returns true if codepoint is a control character, false if not. Returns null on failure.
Examples
Example
php
<?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:
output
bool(false)
bool(false)
bool(true)
bool(true)See Also
IntlChar::isprint()IntlChar::PROPERTY_DEFAULT_IGNORABLE_CODE_POINTctype_cntrl()