Retrieving data in php - php

Question

I've created a page where I've place for updating the attachment. While doing so, if a file with same name, size, extension is attached, the attachment table need not be updated. This is the scenario. This is how I tried to do:
else if($mode == "attachment_update") {
$id = intval(mysqli_real_escape_string($mysqli, $_REQUEST["_id"]));
$upload_directory = "upload/attachment/";
$result = file_upload("attachment", "../".$upload_directory);
$file_name = '".addslashes($result[file_name])."';
write_log($file_name);
$file_extension = '".$result[file_extension]."';
write_log($file_extension);
$file_size = '".$result[file_size]."';
write_log($file_size);
$uploaded_file_name = '".$result[uploaded_file_name]."';
write_log($uploaded_file_name);
$uploaded_file_path = '".$upload_directory.$result[uploaded_file_name]."';
write_log($uploaded_file_path);
$query_select = "SELECT
file_name,
file_extension,
file_size,
uploaded_file_name,
uploaded_file_path
FROM
attachments
WHERE
id = 'id';";
$result1 = mysqli_query($mysqli, $query_select) or throwexception(mysqli_error($mysqli));
$row = mysqli_fetch_row($result1);
write_log($row[0]);
write_log($row[1]);
write_log($row[2]);
write_log($row[3]);
write_log($row[4]);
if($row[0] == $file_name &&
$row[1] == $file_extension &&
$row[2] == $file_size &&
$row[3] == $uploaded_file_name &&
$row[4] == $uploaded_file_path)
{
write_log("inside if");
} else {
if($result[status] == true) {
$query = "UPDATE
attachments
SET
file_name = '".addslashes($result[file_name])."',
file_extension = '".$result[file_extension]."',
file_size = '".$result[file_size]."',
uploaded_file_name = '".$result[uploaded_file_name]."',
uploaded_file_path = '".$upload_directory.$result[uploaded_file_name]."',
recorded_by = '$recorded_by',
recorded_datetime = '$recorded_datetime'
WHERE
id = 'id';";
mysqli_query($mysqli, $query) or throwexception(mysqli_error($mysqli));
}
}
echo json_encode(array("message" => "Updated successfully"));
exit;
}
The if condition does the thing. If all are true, the table will not be updated. If even any one fails, the table will be updated.
Here the problem is $file_name, $file_extension, $file_size, $uploaded_file_name are going null. I don't know how to retrieve it. Can someone tell how to retrieve those data, so that if can check it with the if condition?

Answer 1

In your case, You do not need to fire select query. just add AND condition in update query.
if ($mode == "attachment_update") {
$id = intval(mysqli_real_escape_string($mysqli, $_REQUEST["_id"]));
$upload_directory = "upload/attachment/";
$result = file_upload("attachment", "../" . $upload_directory);
$file_name = '".addslashes($result[file_name])."';
write_log($file_name);
$file_extension = '".$result[file_extension]."';
write_log($file_extension);
$file_size = '".$result[file_size]."';
write_log($file_size);
$uploaded_file_name = '".$result[uploaded_file_name]."';
write_log($uploaded_file_name);
$uploaded_file_path = '".$upload_directory.$result[uploaded_file_name]."';
write_log($uploaded_file_path);
$query = "UPDATE
attachments
SET
file_name = '" . addslashes($result[file_name]) . "',
file_extension = '" . $result[file_extension] . "',
file_size = '" . $result[file_size] . "',
uploaded_file_name = '" . $result[uploaded_file_name] . "',
uploaded_file_path = '" . $upload_directory . $result[uploaded_file_name] . "',
recorded_by = '$recorded_by',
recorded_datetime = '$recorded_datetime'
WHERE
id = 'id'
and file_name <> '" . addslashes($result[file_name]) . "',
and file_extension = '" . $result[file_extension] . "',
and file_size = '" . $result[file_size] . "',
and uploaded_file_name = '" . $result[uploaded_file_name] . "',
and uploaded_file_path = '" . $upload_directory . $result[uploaded_file_name] . "',
;";
mysqli_query($mysqli, $query) or throwexception(mysqli_error($mysqli));
echo json_encode(array("message" => "Updated successfully"));
exit;
}

Answer 2

Your question need more clarity.
Can you share the function,
$result = file_upload("attachment", "../".$upload_directory);
Are you able to log the values of $filename and $row?
write_log($file_name);
AND
write_log($row[0]);