IntlChar::isISOControl

(PHP 7, PHP 8)

IntlChar::isISOControl — Check if code point is an ISO control code

public static IntlChar::isISOControl(int|string $codepoint): ?bool

Determines whether the specified code point is an ISO control code.

true for U+0000..U+001f and U+007f..U+009f (general category "Cc").

codepoint: The int 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 an ISO control code, false if not. Returns null on failure.

示例 #1 Testing different code points

<?php
var_dump(IntlChar::isISOControl(" "));
var_dump(IntlChar::isISOControl("\n"));
var_dump(IntlChar::isISOControl("\u{200e}"));
?>

以上示例会输出：

bool(false)
bool(true)
bool(false)