php - download counter increases by thrice when using a download manager like IDM -

i have created simple php download counter, upon clicking download link, captures , saves details ip, file-name, no of times download has been made, etc. works fine far. counter gets incremented each download made, problem pops when 1 uses idm (or similar download managers); then counter gets incremented thrice each download!

the code i'm using looks (on wordpress environment) -

global $wpdb;              $db_table_name = $wpdb->prefix. 'test_downloads_info';                           $sql = "select download_count $db_table_name download_name = %s";             $result = $wpdb->get_row($wpdb->prepare($sql, $download_name), array_a);              // if row fetched has values..             if(!empty($result) && !empty($result['download_count'])){                  // increment counter one..                 $download_count = $result['download_count'] + 1;                 // , update corresponding row..                 $update_result = $wpdb->update($db_table_name, array('download_ip'=> $download_ip, 'download_count'=> $download_count, 'download_date'=> $download_date), array('download_name'=> $download_name));              }              // otherwise..             else{                  // insert new records..                 $insert_result = $wpdb->insert($db_table_name, array('download_name'=> $download_name, 'download_url'=> $download, 'download_ip'=> $download_ip, 'download_count'=> $download_count, 'download_date'=> $download_date), array('%s', '%s', '%s', '%d', '%s'));              }                             /**             * prepare force download requested file             */              // required ie..             if(ini_get('zlib.output_compression'))                 ini_set('zlib.output_compression', 'off');              // send needed headers download prompting..              header('pragma: public');             header('expires: 0');             header('cache-control: must-revalidate; post-check=0, pre-check=0');             header('cache-control: private', false);             header('content-type: application/pdf');             header("content-disposition: attachment; filename=\"". basename($download). "\"");             header('content-transfer-encoding: binary');             /*header('content-length: '. filesize($download));*/             header('connection: close');             readfile($download);             exit();                   } 

so main problem counter gets incremented twice or thrice if 1 uses download manager idm. don't know i'm doing wrong here. also, i'm php newbie.

idm work requesting different part of same file parallelize download.

you should try check if $_server['http_range'] variable present, , not increment counter if is. variable used idm-like software, or browser resume download.