XML AJAXLesson 26Free preview

AJAX PHP

This lesson is part of XML · All levels

Summary

PHP is often used as a server-side in AJAX applications because it is capable of reading databases, processing data, and then sending it as XML or JSON. Simply set the correct Content-Type header before output, and the query results can be sent directly to the client. The AJAX page then calls this PHP script through the URL.

Key points

PHP sets up the data and sends it to the AJAX page
Content-Type header must be set before output
PHP reads the request parameters through $_GET and $_POST
Extensions like SimpleXML help form XML
The output of PHP can be JSON with json_encode

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