(PHP 4, PHP 5, PHP 7)
strtoupper — ���ַ���ת��Ϊ��д
$string
) : string
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Example #1 strtoupper() ����
<?php
$str = "Mary Had A Little Lamb and She LOVED It So";
$str = strtoupper($str);
echo $str; // ��ӡ MARY HAD A LITTLE LAMB AND SHE LOVED IT SO
?>
Note: �˺����ɰ�ȫ���ڶ����ƶ���