HTML if image is not found

Question

I have an image in a HTML page:

If the image is not found o

Answer 1

If you want an alternative image instead of a text, you can as well use php:

$file="smiley.gif";
$alt_file="alt.gif";
if(file_exist($file)){
     echo "";
}else if($alt_file){
     // the alternative file too might not exist not exist
     echo "";
}else{
  echo "smily face";
}