(PHP 7, PHP 8)
IntlChar::toupper — 将Unicode字符转换为大写
给定的字符映射到其大写等价物。如果字符没有大写等价物,则返回字符本身。
示例 #1 测试不同的代码点
<?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")));
?>
以上示例将输出
string(1) "A" string(1) "A" string(2) "Φ" string(2) "Φ" string(1) "1" int(65) int(65)