Example Explained - The HTML Page
When a user selects a user in the dropdown list above, a function called "showUser()" is executed. The function is triggered by the "onchange" event:
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Person info will be listed here.
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The showUser() function does the following:
- Check if a person is selected
- Create an XMLHttpRequest object
- Create the function to be executed when the server response is ready
- Send the request off to a file on the server
- Notice that a parameter (q) is added to the URL (with the content of the dropdown list)
The PHP File
The page on the server called by the JavaScript above is a PHP file called "getuser.php".
The source code in "getuser.php" runs a query against a MySQL database, and returns the result in an HTML table:
";while($row = mysql_fetch_array($result))
{
echo "";
echo "";
echo "";
echo "";
echo "";
echo "";
echo "";
}
echo "
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