IntlChar::isdefined
(PHP 7)
IntlChar::isdefined — Check whether the code point is defined
説明
Determines whether the specified code point is "defined", which usually means that it is assigned a character.
TRUE for general categories other than "Cn" (other, not assigned).
注意:
Note that non-character code points (e.g., U+FDD0) are not "defined" (they are Cn), but surrogate code points are "defined" (Cs).
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 a defined character, FALSE if not.
例
例1 さまざまなコードポイントの例
<?php
var_dump(IntlChar::isdefined("A"));
var_dump(IntlChar::isdefined(" "));
var_dump(IntlChar::isdefined("\u{FDD0}"));
?>
上の例の出力は以下となります。
bool(true) bool(true) bool(false)
参考
- IntlChar::isdigit() - Check if code point is a digit character
- IntlChar::isalpha() - Check if code point is a letter character
- IntlChar::isalnum() - Check if code point is an alphanumeric character
- IntlChar::isupper() - Check if code point has the general category "Lu" (uppercase letter)
- IntlChar::islower() - Check if code point is a lowercase letter
- IntlChar::istitle() - Check if code point is a titlecase letter
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