외부이미지 저장관련 질문좀 드릴게요

<?php//ver1.0 150410 @_untitle_d  function save_remote_image($url, $save_path){    $ch = curl_init ($url);    curl_setopt($ch, CURLOPT_HEADER, 0);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);    $data=curl_exec($ch);    curl_close ($ch);		$chars_array = array_merge(range(0,9), range('a','z'), range('A','Z'));	$filename = preg_replace("/\.(php|phtm|htm|cgi|pl|exe|jsp|asp|inc)/i", "$0-x", basename($url));	shuffle($chars_array);	$shuffle = implode("", $chars_array);	$change_filename = abs(ip2long($_SERVER[REMOTE_ADDR])).'_'.substr($shuffle,0,8).'_'.str_replace('%', '', urlencode(str_replace(' ', '_', $filename))); 	$out_path = $save_path.$change_filename;	    if(file_exists($out_path)) @unlink($out_path);    $fp = fopen($out_path,'x');    fwrite($fp, $data);    fclose($fp);		return $change_filename;}   if ($w == '' || $w == 'r'){ 	$data_dir = G5_DATA_PATH.'/file/'.$bo_table.'/';	$data_url = G5_DATA_URL.'/file/'.$bo_table.'/';		$img_content = str_replace("&gt;", ">", str_replace("&lt;", "<", stripslashes($_POST[wr_content])));	$patten = "/<img[^>]*src=[\"']?([^>\"']+)[\"']?[^>]*>/i";	preg_match_all($patten, $img_content, $match); 		if ($match[1]) {		foreach ($match[1] as $link) {			$url = parse_url($link);			if ($url[host] && $url[host] != $_SERVER[HTTP_HOST]) {				$img_content = str_replace($link, ($data_url.save_remote_image($link, $data_dir)), $img_content);			}		}				$sql = "update ".$write_table." set wr_content = '".sql_real_escape_string(trim($img_content))."' where wr_id = '".$wr_id."'";		sql_query($sql);	}	}   ?>

<?phpif (!defined("_GNUBOARD_")) exit; // 개별 페이지 접근 불가 //ver1.0 150723 @_untitle_d   if ($wr_link1){		$yt_id = get_youtube_id(trim($wr_link1));		sql_query(" update {$write_table} set wr_1 = '{$yt_id}' where wr_id = '{$wr_id}' ");		$return = get_youtube_info($yt_id);	$yt_title = $return['items'][0]['snippet']['title'];	$yt_thumb = $return['items'][0]['snippet']['thumbnails']['high']['url']; 	$url = parse_url($yt_thumb);	if ($url['host'])	{		$data_dir = G5_DATA_PATH.'/file/'.$bo_table.'/';		$data_url = G5_DATA_URL.'/file/'.$bo_table.'/';				$sri = save_remote_image($yt_thumb, $data_dir);				$jpg_info = exif_read_data($data_dir.$sri);		$sql_common = " bf_source = '{$sri}',						bf_file = '{$sri}',						bf_filesize = '{$jpg_info['FileSize']}',						bf_width = '{$jpg_info['COMPUTED']['Width']}',						bf_height = '{$jpg_info['COMPUTED']['Height']}',						bf_type = '{$jpg_info['FileType']}',						bf_datetime = '".G5_TIME_YMDHIS."' ";	}else		$sql_common = " bf_source = '', bf_file = '', bf_filesize = '0', bf_width = '0', bf_height = '0', bf_type = '0', bf_datetime = '".G5_TIME_YMDHIS."' ";		$row = sql_fetch(" select count(*) as cnt from {$g5['board_file_table']} where bo_table = '{$bo_table}' and wr_id = '{$wr_id}' and bf_no = '0' ");	if ($row['cnt'])		sql_query(" update {$g5['board_file_table']} set {$sql_common} where bo_table = '{$bo_table}' and wr_id = '{$wr_id}' and bf_no = '0' ");	else    	sql_query(" insert into {$g5['board_file_table']} set bo_table = '{$bo_table}', wr_id = '{$wr_id}', bf_no = '0', bf_download = 0, {$sql_common} ");		$row = sql_fetch(" select count(*) as cnt from {$g5['board_file_table']} where bo_table = '{$bo_table}' and wr_id = '{$wr_id}' ");	sql_query(" update {$write_table} set wr_file = '{$row['cnt']}' where wr_id = '{$wr_id}' ");		//if ($wr_subject == 'y' or $wr_subject == 'ㅛ')	//	sql_querby(" update {$write_table} set wr_subject = '".mysql_real_escape_string($yt_title)."' where wr_id = '{$wr_id}' ");	}else{		sql_query(" update {$write_table} set wr_1 = '' where wr_id = '{$wr_id}' ");		$row = sql_fetch(" select bf_file from {$g5['board_file_table']} where bo_table = '{$bo_table}' and wr_id = '{$wr_id}' and bf_no = '0' ");	@unlink(G5_DATA_PATH.'/file/'.$bo_table.'/'.$row['bf_file']);	sql_query(" update {$g5['board_file_table']} set bf_source = '', bf_file = '', bf_filesize = '0', bf_width = '0', bf_height = '0', bf_type = '0', bf_datetime = '".G5_TIME_YMDHIS."' where bo_table = '{$bo_table}' and wr_id = '{$wr_id}' and bf_no = '0' ");	}     if ($wr_2){	$link = 'http://vd.whiteholic.net/'.base64_encode(trim($wr_2));	sql_query(" update {$write_table} set wr_link2 = '{$link}' where wr_id = '{$wr_id}' ");}else{	sql_query(" update {$write_table} set wr_link2 = '' where wr_id = '{$wr_id}' ");}     sql_query(" update {$write_table} set wr_3 = '".$pic_ratio1."|".$pic_ratio2."', wr_4 = '".$autoplay1."|".$autoplay2."' where wr_id = '{$wr_id}' ");    ?>