how to add image file/s to mysql table.I am a programmer I am using php and mysql.
You shouldn't add the image itself for websites. You upload the image to the server and then save the path into the database. You should be able to then output the path of the file to HTML.
You need to use blob (or mediumblob or longblob depending on the maximum size of images you want to support) data type for storing binary data.
Before inserting, be sure to escape special characters in the binary image data.
$img_data =mysql_real_escape_string(file_get_contents($filename));
I usually store the url of the image file rather than the file itself (not too sure how you would do that anyway). I recommend storing the url and using
Related
A table containing almost four thousand records includes a mediumblob field for each record that contains the record's associated PDF report. Under both MySQL Workbench and phpMyAdmin the relevant DOCUMENT column displays the data as a BLOB button or link. In the case of phpMyAdmin the link also indicates the size of the data the Blob contains.
The issue is that when the Blob button/link is clicked, under MySQL Workbench opening any of the files using the SQL Editor only displays the raw Blob data and under phpMyAdmin th link only allows the Blob data to be saved as a .bin file instead of displaying or saving the data as a viewable PDF file. All previous attempts to retrieve the original PDFs using PHP have failed - see related earlier thread: Extract Pdf from MySql Dump Saved as Text.
The filename field in the table shows that all the stored files are PDF files. Further research and tests indicate that the mediumblob data has been stored as application/octet-streams.
My question is how can the original PDFs be retrieved as readable PDFs? Is it possible for a .bin file saved from the database to be converted or used to recover the original PDF file?
Any assistance would be greatly appreciated.
In line with my assumption and Isaac's suggestion the only solution was to be able to speak to one of the software developers. It transpires that the documents have been zipped using an third-party library as well as the header being removed before then being stored in the database.
The third-party library used is version 2.0.50727 of Chilkat, available from www.chilkatsoft.com. That version no longer appears to be available, but hopefully at least one of the later versions may do the job.
Thanks again for everyone's input and assistance.
Based on the discussion in the comments, it sounds like you'll need to either refer to the original source code or consult with the original developer to determine exactly how the data was stored.
Using phpMyAdmin to download the mediumblob data as a file will download a .bin file in many cases, I actually don't recall how it determines content type (for instance, a PNG file will download with a .png extension, but most other binary files simply download as a .bin when phpMyAdmin isn't sure what the extension should be, PDF included). So the behavior you're seeing from phpMyAdmin is expected and correct, but since the .bin file doesn't work when it's renamed to .pdf that means something has probably gone wrong with the import and upload.
BLOB data is often stored in a pretty standardized way, but it seems your data doesn't follow that method.
Without us seeing the code directly, we can't guess what exactly happened with storing the data and would only be guessing.
How can I insert an image data in MySQL Database and then retrieve it using Golang?
Basically I want that task for upload profile picture of user in web application.
According to the my knowledge,the best solution is save image as blob object in database.Is it best solution for upload image in webapplication in golang.?
Please help me find the best solution for that.I want to find the solution in golang.I am beginner for golang programming.
converting image to a blob and save it in the database is a somewhat long process and it may cause issues sometimes. The easiest way is saving the image to a server (or a local directory) and saving the image path in the database. In that way we can access the image by using the image path in the database. This, will show how to save image path and access it and converting image to a blob and save it in the database.
Here
I'm kinda a programming noobie but here it goes:
I opened an image file with the program binaryviewer (http://www.proxoft.com/BinaryViewer.aspx) to see its binary code.
Then I used its copy function to first copy the binary data as a .txt file, then as a .jpeg file. The resulting files are quite smaller than the original image file and are completely not readable as images.
Why are the resulting images so much smaller? What kind of data is getting lost in this process and are there ways to prevent that?
Are there specific ways to recreate the image of a file containing only the 0s and 1s of a original image file?
Whatever binary viewer you are using, it just looks at the raw bytes as stored in the file on the disk.
1) When saving 'as text' is itself determines in which format it writes the binary information to a text file. You should look that up in its documentation.
2) It is very unlikely that it has knowledge about the structure of jpg files. So again, when you save to a .jpg file, it itself chooses how to output the bytes, dumps them to a file named .jpg, but it does not have the on-disk structure of a .jpg. For any image viewer trying to read the file, it's just garbage.
But as I said in my comments, without knowing what 'binary viewer' you are talking about it's not possible to be more specific.
I use Access 2007
I have created an OLE field to store JPEG, so I can easily drag them into DATABASE.
That works. Trouble is: This field does not dispaly the JPEG but the generic JPEG thumb and I need to double click to open the JPEG and preview it.
Is there a way to preview JPEG without having to double click on it ?
regards
Have you considered storing your images entries for your database as 'text', and simply store the path for the image(//pics/mypic.jpg), rather than the image object itself? If your database is on a shared drive, you can create a folder in the same folder as your database to hold your images. When inserting an image, you can have a textbox and simply type the relative path to that image. This will prevent your database from inflating in size. From there, it is just some simple code to display the picture.
After setting your database up to just store the path names of the images, you can follow these easy instructions on how to display these images on forms : Microsoft Knowledge Base
I recently switched a couple of my databases from using OLE's to text fields with the path name of the picture and am really satisfied with it.
You will need to use an Attachment data type to display anything other than bmps. Only bmp images will display in an OLE field (see the Northwind sample database for an example, the Employee form shows bmp images stored in an OLE field).
Alternatively, you can store the path to the image and show it in your form with some VBA. In general, it is best to store paths to images, rather than images, even with databases that have much higher size limits.
Hi i am writing a converter from Oracle to mysql
In Oracle the images are stored in db.
I want to read the content of the image and save to file system
I suppose that i have to read the blob entry and using php file commands create the file (am i right)
What about image type. Should i save as jpg (what if the store image is not jpg)
Any suggestion are welcome
you can write the blob directly to a file on disk. you can exclude the file extension from the name if you don't have that information somewhere in the db or the app. you could also deduce the content type by using the unix file command if you really need to assign an extension.