Check if code point is permissible in an identifier

IntlChar::isIDIgnorable
IntlChar::isIDStart
IntlChar
PHP Manual

# IntlChar::isIDPart

(PHP 7)

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

### Description

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

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().

### Parameters

`codepoint`

  The integer codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")

### Return Values

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

### Examples

Example #1 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}"));
?>`

The above example will output:

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

### See Also

- 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`

IntlChar::isIDIgnorable
IntlChar::isIDStart
IntlChar
PHP Manual