Php/docs/intlchar.isidignorable

• PHP Manual
• IntlChar
• Check if code point is an ignorable character

IntlChar::isIDIgnorable

(PHP 7)

IntlChar::isIDIgnorable — Check if code point is an ignorable character

说明

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

Determines if the specified character should be regarded as an ignorable character in an identifier.

true for characters with general category "Cf" (format controls) as well as non-whitespace ISO controls (U+0000..U+0008, U+000E..U+001B, U+007F..U+009F).

Note:

Note that Unicode just recommends to ignore Cf (format controls).

参数

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}")

返回值

Returns true if codepoint is ignorable in identifiers, false if not.

范例

Example #1 Testing different code points

<?phpvar_dump(IntlChar::isIDIgnorable("A"));var_dump(IntlChar::isIDIgnorable(" "));var_dump(IntlChar::isIDIgnorable("\u{007F}"));?>

以上例程会输出：

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

参见

• IntlChar::isIDStart() - Check if code point is permissible as the first character in an identifier
• IntlChar::isIDPart() - Check if code point is permissible in an identifier
• IntlChar::PROPERTY_DEFAULT_IGNORABLE_CODE_POINT