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PHP > Tips and Tutorials > File Manipulation
Oct 15, 2006
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Other links at PHP > Tips and Tutorials > File Manipulation
Well, tired of FTP'n everything up to your site? Or even want to allow other members to upload files but you dont' want to give them FTP access? Well lets create a file upload system that will take care of all your uploading woes. THis also employs some minimal security checks.
As of PHP 4.1 uploaded files can be accessed via the $_FILES superglobal, but in earlier versions you can use $HTTP_POST_FILES array and the last option but not recommended will be to use the $upload that corresoponds to the name of the file input. Note: You can only use the last method if register_globals is enabled.
As of PHP 4.1 uploaded files can be accessed via the $_FILES superglobal, but in earlier versions you can use $HTTP_POST_FILES array and the last option but not recommended will be to use the $upload that corresoponds to the name of the file input. Note: You can only use the last method if register_globals is enabled.
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This example browses a directory to list files and rename all files except the ones we do not want to list (as 'Thumbs.db' on windows or '..' and '.' which are not files as well as a directory itself).
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In the previous version of this tutorial I only covered how to paginate a flat file based application. In this updated version, I will discuss some improvements along with pagination for database content as well (specifically, MySQL). I will also cover how to retain any pre-existing query string variables that your application might be using without interfering with our pagination.
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As Web pages have moved from static documents into dynamic database-driven applications, users are looking for the ability to upload data in the form of files. In today's article, we'll be looking at how files can be uploaded and then processed in PHP.
Let's assume that your Web site is devoted to a community of graphic artists from all backgrounds. As your site grew, you started devoting a section to displaying your members' works.
Until now, a member would send his or her contribution to an e-mail address listed on the Web site, and from there the image would be manually processed and added. With PHP 4, not only can your members upload images from the Web site directly, but also the majority of the processing that was done manually can now be automated. Here's how browser-based file uploading works:
Let's assume that your Web site is devoted to a community of graphic artists from all backgrounds. As your site grew, you started devoting a section to displaying your members' works.
Until now, a member would send his or her contribution to an e-mail address listed on the Web site, and from there the image would be manually processed and added. With PHP 4, not only can your members upload images from the Web site directly, but also the majority of the processing that was done manually can now be automated. Here's how browser-based file uploading works:
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Files are uploaded from the browser using an tag, with the type parameter in the tag set to "File". This is supported by all popular browsers currently available on the market. The important thing is to set the ENCTYPE attribute of the form to "multipart/form-data" and set the form's action element to the file upload page. The file upload page will handle the file uploading.
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