How to Retrieve Multiple Selected Values from a Select Box in PHP using GET?

Retrieving Multiple Selected Values from a Select Box in PHP

When creating a form with a select box that allows multiple selections, it becomes necessary to access the selected values on the server-side. This article demonstrates how to retrieve these values in PHP when the form uses the GET method.

Form Structure

The following HTML code represents a form with a select box named "select2" that has the "multiple" attribute set, allowing users to choose multiple options:

Accessing Selected Values in PHP

To retrieve the selected values in PHP, we can use the $_GET superglobal array:

// Use $_GET or $_POST depending on the form method
$selectedOptions = isset($_GET['select2']) ? $_GET['select2'] : [];

foreach ($selectedOptions as $option) {
  // Do something with the selected option (e.g., print it)
  echo $option . "\n";
}

Key to Retrieval

In the PHP code above, we add square brackets to the name of the select element: select2[]. This informs PHP that the element should be treated as an array of options. When the form is submitted, the selected values will be stored in the $_GET['select2'] array.

Conclusion

By understanding how to access the selected values of a multiple-selection select box in PHP, you can effectively collect user input and store it on the server-side for further processing.

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