php如何利用正则表达式去除所有英文标点符号

<?php
header("Content-type:text/html;charset=utf-8");
$str = "0112!@78#9$%^56&78*9()0.8,7<>8|3[]8'45\"67！【】“45”‘67’"; 
echo "原字符串：".$str."<br><br>";
$Newstr=preg_replace('/[[:punct:]]/i','',$str);
echo "处理后：".$Newstr;
?>