Php/docs/intlchar.isidpart

• PHP Manual
• IntlChar
• Check if code point is permissible in an identifier

IntlChar::isIDPart

(PHP 7)

IntlChar::isIDPart — Check if code point is permissible in an identifier

说明

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

Determines if the specified character is permissible in an identifier.

true for characters with general categories "L" (letters), "Nl" (letter numbers), "Nd" (decimal digits), "Mc" and "Mn" (combining marks), "Pc" (connecting punctuation), and u_isIDIgnorable(c).

Note:

This is almost the same as Unicode's ID_Continue (IntlChar::PROPERTY_ID_CONTINUE) except that Unicode recommends to ignore Cf which is less than IntlChar::isIDIgnorable().

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 the code point may occur in an identifier, false if not.

范例

Example #1 Testing different code points

<?phpvar_dump(IntlChar::isIDPart("A"));var_dump(IntlChar::isIDPart("$"));var_dump(IntlChar::isIDPart("\n"));var_dump(IntlChar::isIDPart("\u{2603}"));?>

以上例程会输出：

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

参见

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