Php/docs/intlchar.isupper
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IntlChar::isupper
(PHP 7)
IntlChar::isupper — Check if code point has the general category "Lu" (uppercase letter)
说明
public static IntlChar::isupper
( mixed $codepoint
) : bool
Determines whether the specified code point has the general category "Lu" (uppercase letter).
Note:
This misses some characters that are also uppercase but have a different general category value. In order to include those, use IntlChar::isUUppercase().
参数
codepoint
- The int codepoint value (e.g.
0x2603
for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g."\u{2603}"
)
返回值
Returns true
if
codepoint
is an Lu uppercase letter, false
if not.
范例
Example #1 Testing different code points
<?phpvar_dump(IntlChar::isupper("A"));var_dump(IntlChar::isupper("a"));var_dump(IntlChar::isupper("Φ"));var_dump(IntlChar::isupper("φ"));var_dump(IntlChar::isupper("1"));?>
以上例程会输出:
bool(true) bool(false) bool(true) bool(false) bool(false)
参见
- IntlChar::islower() - Check if code point is a lowercase letter
- IntlChar::istitle() - Check if code point is a titlecase letter
- IntlChar::tolower() - Make Unicode character lowercase
- IntlChar::toupper() - Make Unicode character uppercase
IntlChar::PROPERTY_UPPERCASE