Check if code point is permissible in an identifier

# IntlChar::isIDPart

(PHP 7)

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

### 説明

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).

> 注意:

> 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().

### パラメータ

`codepoint`

  コードポイントを表す integer 型の値 (例: U+2603 SNOWMAN を表す 0x2603)、あるいは UTF-8 文字列としてエンコードされた文字 (例: "\u{2603}")。

### 返り値

Returns `TRUE` if `codepoint` is the code point may occur in an identifier, `FALSE` if not.

### 例

例1 さまざまなコードポイントの例

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

上の例の出力は以下となります。

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

### 参考

- 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`