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IntlChar::isIDIgnorable

(PHP 7)

IntlChar::isIDIgnorableCheck if code point is an ignorable character

説明

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

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).

注意:

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

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 ignorable in identifiers, FALSE if not.

例1 さまざまなコードポイントの例

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

上の例の出力は以下となります。

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

参考

  • 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

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