A php function that can remove html tags from a string

When visitors leave messages and posts, we do not want visitors to use html tags in their messages and posts, so we have to delete the html tags when visitors submit messages and posts. The following function is the function that implements this function
function delete_htm($scr)
{
for($i=0;$i {
if(substr($scr,$i,1)=="<")
{
while(substr($scr,$i,1)!=">")$i++;
$i++;
}
$str=$str.substr($scr,$i,1);
}
return($str);
}
?>

The above introduces a PHP function that can delete HTML tags in strings, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.