(PHP 7)
Check if code point has the general category "Lu" (uppercase letter)
public static bool IntlChar::isupper ( mixed $codepoint )
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().
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}")
Returns:
Returns TRUE
if codepoint
is an Lu uppercase letter, FALSE
if not.
Examples:
Testing different code points
<?php var_dump(IntlChar::isupper("A")); var_dump(IntlChar::isupper("a")); var_dump(IntlChar::isupper("Φ")); var_dump(IntlChar::isupper("φ")); var_dump(IntlChar::isupper("1")); ?>
The above example will output:
bool(true) bool(false) bool(true) bool(false) bool(false)
See also:
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