常用js正则

　$flow_content = eregi_replace("'","'",$flow_content); 
$flow_content = eregi_replace('"','"',$flow_content);

1. $str=preg_replace("/\s+/", " ", $str); //过滤多余回车
2. $str=preg_replace("/<[ ]+/si","<",$str); //过滤<__("<"号后面带空格)
3. $str=preg_replace("/<\!--.*?-->/si","",$str); //注释
4. $str=preg_replace("/<(\!.*?)>/si","",$str); //过滤DOCTYPE
5. $str=preg_replace("/<(\/?html.*?)>/si","",$str); //过滤html标签
6. $str=preg_replace("/<(\/?head.*?)>/si","",$str); //过滤head标签
7. $str=preg_replace("/<(\/?meta.*?)>/si","",$str); //过滤meta标签
8. $str=preg_replace("/<(\/?body.*?)>/si","",$str); //过滤body标签
9. $str=preg_replace("/<(\/?link.*?)>/si","",$str); //过滤link标签
10. $str=preg_replace("/<(\/?form.*?)>/si","",$str); //过滤form标签
11. $str=preg_replace("/cookie/si","COOKIE",$str); //过滤COOKIE标签
12. $str=preg_replace("/<(applet.*?)>(.*?)<(\/applet.*?)>/si","",$str); //过滤applet标签
13. $str=preg_replace("/<(\/?applet.*?)>/si","",$str); //过滤applet标签
14. $str=preg_replace("/<(style.*?)>(.*?)<(\/style.*?)>/si","",$str); //过滤style标签
15. $str=preg_replace("/<(\/?style.*?)>/si","",$str); //过滤style标签
16. $str=preg_replace("/<(title.*?)>(.*?)<(\/title.*?)>/si","",$str); //过滤title标签
17. $str=preg_replace("/<(\/?title.*?)>/si","",$str); //过滤title标签
18. $str=preg_replace("/<(object.*?)>(.*?)<(\/object.*?)>/si","",$str); //过滤object标签
19. $str=preg_replace("/<(\/?objec.*?)>/si","",$str); //过滤object标签
20. $str=preg_replace("/<(noframes.*?)>(.*?)<(\/noframes.*?)>/si","",$str); //过滤noframes标签
21. $str=preg_replace("/<(\/?noframes.*?)>/si","",$str); //过滤noframes标签
22. $str=preg_replace("/<(i?frame.*?)>(.*?)<(\/i?frame.*?)>/si","",$str); //过滤frame标签
23. $str=preg_replace("/<(\/?i?frame.*?)>/si","",$str); //过滤frame标签
24. $str=preg_replace("/<(script.*?)>(.*?)<(\/script.*?)>/si","",$str); //过滤script标签
25. $str=preg_replace("/<(\/?script.*?)>/si","",$str); //过滤script标签
26. $str=preg_replace("/javascript/si","Javascript",$str); //过滤script标签
27. $str=preg_replace("/vbscript/si","Vbscript",$str); //过滤script标签
28. $str=preg_replace("/on([a-z]+)\s*=/si","On\\1=",$str); //过滤script标签
29. $str=preg_replace("/&#/si","&＃",$str); //过滤script标签，如javAsCript:alert('aabb)