PHP - AJAXLesson 78Free preview

AJAX Database

This lesson is part of PHP · All levels

Summary

AJAX takes data from a database when JavaScript requests a PHP file that runs a MySQL query. This pattern is used for instant searches, loading more data, or updating statistics without reloading pages. Security remains a must, especially using prepared statement on each user input.

Key points

The server provides a PHP file that reads the database and then sends JSON or HTML responses.
Any user value must be entered through the prepared statement.
The result limit (LIMIT) keeps the response light.
Handle connection failures and empty results to keep the UI informative.

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