IntlChar::isupper
Check if code point has the general category "Lu" (uppercase letter)
Description
public static boolnull IntlChar::isupper(intstring $codepoint)
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 int codepoint value (e.g. 0x2603 for U+2603 SNOWMAN), or the character encoded as a UTF-8 string (e.g. "\u{2603}")
Return Values
Returns true if
codepoint is an Lu uppercase letter, false if not. Returns null on failure.
Examples
Example #1 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
- IntlChar::islower
- IntlChar::istitle
- IntlChar::tolower
- IntlChar::toupper
IntlChar::PROPERTY_UPPERCASE- ctype_upper