IntlChar::isdefined
(PHP 7)
IntlChar::isdefined — Check whether the code point is defined
説明
public static IntlChar::isdefined
( mixed $codepoint
) : bool
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 int 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
<?phpvar_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
