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strtoupper

(PHP 4, PHP 5)

strtoupper — Make a string uppercase

说明

string strtoupper ( string $string )

Returns string with all alphabetic characters converted to uppercase.

Note that 'alphabetic' is determined by the current locale. For instance, in the default "C" locale characters such as umlaut-a (ä) will not be converted.

参数

string

The input string.

返回值

Returns the uppercased string.

范例

Example#1 strtoupper() example

<?php
$str 
"Mary Had A Little Lamb and She LOVED It So";
$str strtoupper($str);
echo 
$str// Prints MARY HAD A LITTLE LAMB AND SHE LOVED IT SO
?>

注释

Note: 本函数可安全用于二进制对象。


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