硕夏网html在线编辑器
HTML在线教程
改变方向
暗黑模式
运行代码
<HTML> <HEAD></HEAD> <FONT FACE="'Courier New',Verdana, Arial, Helvetica" SIZE=2> <!DOCTYPE html> <html> <body> <p>The parameter "mode 3" will return a string with all the different characters used.<?php $str = "Hello World!"; echo count_chars($str,3); ?>