IntlChar::isupper
PHP function
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(PHP 7, PHP 8)
Check if code point has the general category "Lu" (uppercase letter)
Description
IntlChar::isupper(int|string $codepoint): bool|null
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
codepointParameter
Return Values
Returns true if codepoint is an Lu uppercase letter, false if not. Returns null on failure.
Examples
Example
php
<?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:
output
bool(true)
bool(false)
bool(true)
bool(false)
bool(false)See Also
IntlChar::islower()IntlChar::istitle()IntlChar::tolower()IntlChar::toupper()IntlChar::PROPERTY_UPPERCASEctype_upper()