IntlChar::isIDPart()

版本：php7

(PHP 7)

Check if code point is permissible in an identifier

说明

publicstaticIntlChar::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 integer codepoint value(e.g.0x2603forU+2603 SNOWMAN), or the character encoded as a UTF-8 string(e.g."u{2603}")

返回值

Returns TRUE if$codepointis the code point may occur in an identifier,FALSE if not.

范例

Testing different code points

<?php
var_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