Displaying an upload progress bar
Especially when importing a large file, it's interesting to have a visual feedback on the progression of upload. Please note that the progress bar we are discussing here informs us only about the uploading part, which is a subset of the whole import operation.
Having a JavaScript-enabled browser is a requirement for this feature. Moreover, the web server's PHP component must have the JSON extension and at least one of these extensions:
- The well-know APC extension (http://pecl.php.net/package/APC), which is highly recommended anyway for its opcode caching benefits
- The
uploadprogressextension (http://pecl.php.net/package/uploadprogress)
phpMyAdmin uses AJAX techniques to fetch progress information, then displays it ...
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