kiểm tra hình ảnh tồn tại hay không

Step 1:

if(file_exists(INCLUDE_PATH."uploads/shop/pic/small_".$image) && $image!=""){
    echo Yes;
}else{
   echo No;
}

-----------------------------------------------------------------------------
Step 2: 
    link : http://datnguyen179.blogspot.com/2012/12/kiem-tra-su-ton-tai-file-anh-image.html
    $file_path = 'http://tanviet.speedymirror.com/wp-content/uploads/2011/07/border_radius.jpg' ;
    //Ham file_exists()
    if (file_exists($file_path)) {
        echo "This file exists!";
    }
    else {
        echo "This file does not exist";
    }
    //Ham getimagesize() cho ket qua chinh xac hon
    $url = getimagesize($file_path);
    if(is_array($url)){
        echo "<br />This file exists!";
    }
    else {
         echo "<br />This file does not exist!";
    }