php - insert query store 0 in all fields -

when create api , image name consist projectid,user_id,category can't save image in database because image project_id,image_id,image not getting post method.please in advance

 <?php     error_reporting(e_all);     require_once('confi.php');     //destination of images     define('img_destination',dirname(__file__).'/images/');     define('db_name','chat_neeraj');     //saving data image table     function saveimagedata($data,$imgfile){                 $project_id = isset($_post['project_id']) ? mysql_real_escape_string($_post['project_id']) : "";                 $image_id = isset($_post['image_id']) ? mysql_real_escape_string($_post['image_id']) : "";                 //$user_id = isset($_post['user_id']) ? mysql_real_escape_string($_post['user_id']) : "";                 $image_name = isset($_post['image_name']) ? mysql_real_escape_string($_post['image_name']) : "";                 if(isset($_files['tmp_name']) && filesize($_files['tmp_name'])>0)                     saveimagefile($imgfile['tmp_name'],$image_id."_".$project_id."_".$category_id."_".$image_name);                 $category_id = isset($_post['category_id']) ? mysql_real_escape_string($_post['category_id']) : "";                 $houssup_id = isset($_post['houssup_id']) ? mysql_real_escape_string($_post['houssup_id']) : "";                 $location_id = isset($_post['location_id']) ? mysql_real_escape_string($_post['location_id']) : "";                 // insert data data base                 $sql = "insert `".db_name."`.`image_table`(`project_id`, `image_id`,`image_name`,`category_id`,`houssup_id`,`location_id`)                  values(null,'$image_id','$image_name','$category_id','$houssup_id','$location_id')";                 echo $sql;                 if(mysql_query($sql))                     return true;                 else                     return false;     }      //saving image file diskk     function saveimagefile($src,$des){         copy($src,$dest);     }     //select image     function selectimage(){      }      //save image hash tag     function saveimagehashtag(){     }      $action=isset($_request['action'])?$_request['action']:"";     switch($action){         case "save":             if($_server['request_method'] == "post" && isset($_post)){                 if(saveimagedata($_post,$_files)){                     echo "saved";                 }else{                     echo "failed";                 }             }else{                   echo "nothing save";             }             break;         default:             echo "live";             break;      }      //closing db connection     if($conn){         @mysql_close($conn);     } 

try:

$sql = "insert image_table ('project_id', 'image_id','image_name','category_id','houssup_id','location_id')           values(null,$image_id,'$image_name',$category_id,$houssup_id,$location_id)";