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Asked by Pooja Last Modified
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To insert and update dependent dropdowns using PHP, AJAX, and MySQLi, first create the main dropdown and dependent dropdowns in your HTML. Use AJAX to fetch data for the dependent dropdown based on the selected value from the main dropdown. When a user selects an option, send an AJAX request to a PHP script that queries the database and returns the relevant options. For insertion and updates, use AJAX to send the selected values to a PHP script that performs an `INSERT` or `UPDATE` query using MySQLi to save changes in the database.
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