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No refresh file Upload

Ajax Formdata Object completes no-flush operation

The AJAX Level 2 standard can operate on files, but only new browsers (incompatible with the low version of IE), are H5 standard

Precautions:

1. Form size

2. Single File Upload size

   Real:

3. Write a form form, but be aware that the Enctype attribute is not set for form forms

4. Bind a Click event for the uploaded button, complete the AJAX submission upload file

5. Use Formdata to collect data from form forms (normal data + upload domain)

6. To use the onprogress handle of the upload member of an Ajax object to monitor the file upload situation

   1. Set an upload progress bar display box

   b) CSS Settings

   c) Set up monitoring file upload events

7. To monitor Ajax operations with onReadyStateChange

8. Send AJAX requests (Note: You do not need to set up an AJAX request header when using Formdata to upload data)

9. Use the event source (the uploaded file) to make progress display in OnProgress

10. Server data.php file implementation upload file processing

    IFRAME implementation without flush upload

11. Create a index.php file, set the upload domain

    Technology point 1: You need to set up a form submission open window an IFRAME defined for itself

    Technical point 2: The data.php file needs to process the resulting picture, then return the image URL address, use top to get the window to open the current IFRAME, modify the src attribute of the IMG tag

    2. data.php to finish saving and returning pictures

The above on the introduction of no-refresh file upload, including file upload, the content of the new text, I hope that the PHP tutorial interested in a friend helpful.

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