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(PHP 7, PHP 8)
IntlChar::toupper — Make Unicode character uppercase
The given character is mapped to its uppercase equivalent. If the character has no uppercase equivalent, the character itself is returned.
Returns the Simple_Uppercase_Mapping of the code point, if any; otherwise the code point itself.
The return type is int unless the code point was passed as a UTF-8 string, in which case a string is returned. Returns null
on failure.
Example #1 Testing different code points
<?php
var_dump(IntlChar::toupper("A"));
var_dump(IntlChar::toupper("a"));
var_dump(IntlChar::toupper("Φ"));
var_dump(IntlChar::toupper("φ"));
var_dump(IntlChar::toupper("1"));
var_dump(IntlChar::toupper(ord("A")));
var_dump(IntlChar::toupper(ord("a")));
?>
The above example will output:
string(1) "A" string(1) "A" string(2) "Φ" string(2) "Φ" string(1) "1" int(65) int(65)