PHP将字符转为大写的函数是哪个？
在PHP中将字符转为大写的函数是“strtoupper()”，该函数的作用是将字符串转化为大写，语法为“strtoupper(string $string)”，返回值为转换后的大写字符串。
示例代码
<?php $str = "Mary Had A Little Lamb and She LOVED It So"; $str = strtoupper($str); echo $str; // 打印 MARY HAD A LITTLE LAMB AND SHE LOVED IT SO ?>
使用示例
<?php
define("LATIN1_UC_CHARS", "ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝ");
define("LATIN1_LC_CHARS", "àáâãäåæçèéêëìíîïðñòóôõöøùúûüý");
function uc_latin1 ($str) {
$str = strtoupper(strtr($str, LATIN1_LC_CHARS, LATIN1_UC_CHARS));
return strtr($str, array("ß" => "SS"));
}
?>
<?php
function strtoupper_utf8($string){
$string=utf8_decode($string);
$string=strtoupper($string);
$string=utf8_encode($string);
return $string;
}
?>