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(PHP 7)
IntlChar::iscntrl — Check if code point is a control character
$codepoint
)Determines whether the specified code point is a control character.
A control character is one of the following:
IntlChar::CHAR_CATEGORY_CONTROL_CHAR
(Cc)IntlChar::CHAR_CATEGORY_FORMAT_CHAR
(Cf)IntlChar::CHAR_CATEGORY_LINE_SEPARATOR
(Zl)IntlChar::CHAR_CATEGORY_PARAGRAPH_SEPARATOR
(Zp)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}")
Returns TRUE
if
codepoint
is a control character, FALSE
if not.
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}" ));
?>
以上例程会输出:
bool(false) bool(false) bool(true) bool(true)
IntlChar::PROPERTY_DEFAULT_IGNORABLE_CODE_POINT