IntlChar::isupper

(PHP 7)

IntlChar::isupper — Check if code point has the general category "Lu" (uppercase letter)

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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().

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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}")

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Returns TRUE if codepoint is an Lu uppercase letter, FALSE if not.

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Example #1 Testing different code points

<?php
var_dump(IntlChar::isupper("A"));
var_dump(IntlChar::isupper("a"));
var_dump(IntlChar::isupper("锟斤拷"));
var_dump(IntlChar::isupper("锟斤拷"));
var_dump(IntlChar::isupper("1"));
?>

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bool(true)
bool(false)
bool(true)
bool(false)
bool(false)

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