Question

So I'm writing a script to delete images from my server. Basically I have a table in my Database which contains a list of buildings and each building has multiple images associated with an id. I'm saving my images on the server in a single folder and each image has the following naming format: buildingID_imagename.jpg. For example, if I have a building with id=23, my images in my folder will appear as 23_imagename1.jpg, 23_imagename2.jpg, etc.

Now, I know how to delete an image using PHP using the unlink function. However, to delete all the images, I need to check each file file name one by one, do a split string manipulation, check for the id and then delete. The issue arises when I have like 10000 images in that folder. This becomes an expensive task to do although it will work.

My question, is there a simple way to check the image name and delete it from the folder?

Thanks

EDIT After typing this, I just thought of one possible way. Getting all image links from my database table into an array, loop through it and delete just those. Would that be a good method to do it? Of course, after I get the images into an array, I'm also deleting them from the table.

Answer 1

Iterate over the dataset, check if file exists and remove the file.

Maybe execute it as a cron job in-case you think there could be thousands of file in this operation.

if(file_exists($fileName)){
    unlink($fileName);
}

Answer 2

您也可以使用

<? array_map ('unlink',glob('23_imagename*.jpg')); ?> // this example deletes all files with .jpg extension that starts with 23_imagename

使用glob功能，您可以应用正则表达式来有效地找到要删除的文件

http://php.net/manual/en/function.glob.php

Efficient way to delete files from server PHP

2 个答案: