IntlChar
PHP Manual

IntlChar::iscntrl

(PHP 7)

IntlChar::iscntrlCheck if code point is a control character

说明

public static bool IntlChar::iscntrl ( mixed $codepoint )

Determines whether the specified code point is a control character.

A control character is one of the following:

参数

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}")

返回值

Returns TRUE if codepoint is a control character, FALSE if not.

范例

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)

参见


IntlChar
PHP Manual