PHP字符串位数截取

PHP字符串前N位截取

<?php

header('content-type:text/html;charset=utf-8');   

$str="欢迎来到Fish's Blog";

echo "原字符串：".$str."<br>";

echo "截取前1位：".mb_substr($str,0,1,"utf-8")."<br>";

echo "截取前2位：".mb_substr($str,0,2,"utf-8")."<br>";

?>