Databases
StackOverflow2013
Postsdbo
POHow to deny identical images being uploaded with PHP
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to deny identical images being uploaded with PHP
    primarykey
    data
    text
    <p>I want to create a way to search a directory by Imagetype or similiar variable.. before the image is uploaded to that diretory. </p> <p>My goal is to search the BLOB of images in that directory with php, and if any result match (meaning there will duplicate uploads of the same image) return with "File already uploaded". </p> <p>This will only pertain to image files...</p> <p>Here is the code I think I can add too..</p> <pre><code>// Elements (values) of $_FILES['ImageFile'] array //let's access these values by using their index position $ImageName = str_replace(' ','-',strtolower($_FILES['ImageFile']['name'])); $ImageSize = $_FILES['ImageFile']['size']; // Obtain original image size $TempSrc = $_FILES['ImageFile']['tmp_name']; // Tmp name of image file stored in PHP tmp folder $ImageType = $_FILES['ImageFile']['type']; //Obtain file type, returns "image/png", image/jpeg, text/plain etc. //Let's use $ImageType variable to check wheather uploaded file is supported. //We use PHP SWITCH statement to check valid image format, PHP SWITCH is similar to IF/ELSE statements //suitable if we want to compare the a variable with many different values switch(strtolower($ImageType)) { case 'image/png': $CreatedImage = imagecreatefrompng($_FILES['ImageFile']['tmp_name']); break; case 'image/gif': $CreatedImage = imagecreatefromgif($_FILES['ImageFile']['tmp_name']); break; case 'image/jpeg': case 'image/pjpeg': $CreatedImage = imagecreatefromjpeg($_FILES['ImageFile']['tmp_name']); break; default: die('Unsupported File, Please Check File And Try Again!'); //output error and exit } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USMrSeth
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COStore meta data of each file in a database, and then try to look for it by taking meta data from the file to be uploaded? like type, size, dimentions, and some other common stuff
      singulars
      1. POHow to deny identical images being uploaded with PHP
      1. USdeb0rian
    2. COOne of the pieces of metadata you should save is a hash of the contents. That way you can tell if a file has been uploaded even under a different name. And someone could replace a file with one of the same name if the content is different.
      singulars
      1. POHow to deny identical images being uploaded with PHP
      1. USslashingweapon
    3. COWould i still be able to leave the images in a directory on the server?
      singulars
      1. POHow to deny identical images being uploaded with PHP
      1. USMrSeth
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload