이미지 넣을때 코드인데 여기서 리사이징 어떻게 하나요?? 봐주시면 감사하겠습니다ㅠ 채택완료

input type="file"에 이미지를 넣고 insert 하는 php에 있는 코드인데

이미지가 작던 크던 무조건 500x500으로 만들어서 넣으려고합니다

for($i=1;$i<=3;$i++){

        if( $_FILES["images".$i][size] > 0 ) {

            if( $_FILES["images".$i][size] > 1024*1024*$MAXFILESIZE) { $tools->errMsg("업로드 용량 초과입니다\\n\\n$MAXFILESIZE 메가 까지 업로드 가능합니다"); exit(); }

            $EXT_TMP = explode( ".", $_FILES["images".$i][name]);

            ${"images".$i} = 'GOODS'.$i.'_'.time().".".$EXT_TMP[count($EXT_TMP)-1];

            if( !@move_uploaded_file( $_FILES["images".$i][tmp_name], "../../data/goodsImages/".${"images".$i} )) { $tools->errMsg("파일 업로드 에러"); } else { @unlink($_FILES["images".$i][tmp_name]); } 

        }else{

            ${"images".$i} = "";

        }

    }

    // 추가 상품 이미지 등록

    for($i=1;$i<=5;$i++){

        if( $_FILES["add_images".$i][size] > 0 ) {

            if( $_FILES["add_images".$i][size] > 1024*1024*$MAXFILESIZE) { $tools->errMsg("업로드 용량 초과입니다\\n\\n$MAXFILESIZE 메가 까지 업로드 가능합니다"); exit(); }

            $EXT_TMP = explode( ".", $_FILES["add_images".$i][name]);

            ${"add_images".$i} = 'ADD_GOODS'.$i.'_'.time().".".$EXT_TMP[count($EXT_TMP)-1];

            if( !@move_uploaded_file( $_FILES["add_images".$i][tmp_name], "../../data/goodsImages/".${"add_images".$i} )) { $tools->errMsg("파일 업로드 에러"); } else { @unlink($_FILES["add_images".$i][tmp_name]); } 

        } else {

            ${"add_images".$i} = "";

        }

    }

    // 상품 첨부파일

    if( $_POST[file_check] == 1 ) {

        if( $_FILES[goods_file][size] > 0 ) {

            $EXT_CHECK = array("php", "php3", "htm", "html", "cgi", "perl");    // 업로드 파일 제한 확장자 추가 가능

            if( !strstr( $_FILES[goods_file][name], ".")) { $tools->errMsg( strtoupper("확장자가 없는 ".$_FILES[goods_file][name])." 은 업로드 할수 없습니다." ); } else if( $EXT_TMP = explode( ".", $_FILES[goods_file][name])) { foreach ($EXT_CHECK as $value) { if( strstr( $value, strtolower($EXT_TMP[1]))) { $tools->errMsg( strtoupper($EXT_TMP[1])." 은 업로드 할수 없습니다." );}}}

            if( $_FILES[goods_file][size]  > 1024*1024*$MAXFILESIZE) { $tools->errMsg("업로드 용량 초과입니다\\n\\n$MAXFILESIZE 메가 까지 업로드 가능합니다"); exit(); }

            $goods_file_name    = time()."&&".$_FILES[goods_file][name];

            if( !@move_uploaded_file($_FILES[goods_file][tmp_name], "../../data/goodsImages/".$goods_file_name) ) { $tools->errMsg("파일 업로드 에러"); } else { @unlink($_FILES[goods_file][tmp_name]);} 

        }

        if( $_FILES[goods_file2][size] > 0 ) {

            $EXT_CHECK = array("php", "php3", "htm", "html", "cgi", "perl");    // 업로드 파일 제한 확장자 추가 가능

            if( !strstr( $_FILES[goods_file2][name], ".")) { $tools->errMsg( strtoupper("확장자가 없는 ".$_FILES[goods_file2][name])." 은 업로드 할수 없습니다." ); } else if( $EXT_TMP = explode( ".", $_FILES[goods_file2][name])) { foreach ($EXT_CHECK as $value) { if( strstr( $value, strtolower($EXT_TMP[1]))) { $tools->errMsg( strtoupper($EXT_TMP[1])." 은 업로드 할수 없습니다." );}}}

            if( $_FILES[goods_file2][size]  > 1024*1024*$MAXFILESIZE) { $tools->errMsg("업로드 용량 초과입니다\\n\\n$MAXFILESIZE 메가 까지 업로드 가능합니다"); exit(); }

            $goods_file2_name   = time()."&&".$_FILES[goods_file2][name];

            if( !@move_uploaded_file($_FILES[goods_file2][tmp_name], "../../data/goodsImages/".$goods_file2_name) ) { $tools->errMsg("파일 업로드 에러"); } else { @unlink($_FILES[goods_file2][tmp_name]);} 

        }

        if( $_FILES[goods_file3][size] > 0 ) {

            $EXT_CHECK = array("php", "php3", "htm", "html", "cgi", "perl");    // 업로드 파일 제한 확장자 추가 가능

            if( !strstr( $_FILES[goods_file3][name], ".")) { $tools->errMsg( strtoupper("확장자가 없는 ".$_FILES[goods_file3][name])." 은 업로드 할수 없습니다." ); } else if( $EXT_TMP = explode( ".", $_FILES[goods_file3][name])) { foreach ($EXT_CHECK as $value) { if( strstr( $value, strtolower($EXT_TMP[1]))) { $tools->errMsg( strtoupper($EXT_TMP[1])." 은 업로드 할수 없습니다." );}}}

            if( $_FILES[goods_file3][size]  > 1024*1024*$MAXFILESIZE) { $tools->errMsg("업로드 용량 초과입니다\\n\\n$MAXFILESIZE 메가 까지 업로드 가능합니다"); exit(); }

            $goods_file3_name   = time()."&&".$_FILES[goods_file3][name];

            if( !@move_uploaded_file($_FILES[goods_file3][tmp_name], "../../data/goodsImages/".$goods_file3_name) ) { $tools->errMsg("파일 업로드 에러"); } else { @unlink($_FILES[goods_file3][tmp_name]);} 

        }

    } else {

        $goods_file_name    = "";

        $goods_file2_name   = "";

        $goods_file3_name   = "";

    }