php判断是否存在恶意字符实例_PHP教程

function is_bad_chars($str){
$bad_chars = array("\",' ',"'",'"','/','*',',','<','>',"r","t","n",'$','(',')','%','+','?',';','^','#',':','　','`','=','|','-');
foreach($bad_chars as $value){
if (strpos($str,$value) !== false){
return true;
}
}
}

function outip($ip){//排除ip
@$txt = file_get_contents("ip/ip.txt" );
$txtarr = explode("rn" , trim($txt));
if(count($txtarr)<0){
return false;
}
if(in_array($ip,$txtarr)){
return true;
}else{
return false;
}
}