How can PHP be used to allow users to select the sorting criteria for displayed data?

To allow users to select the sorting criteria for displayed data in PHP, you can create a form with options for different sorting criteria (e.g., by name, by date, by price). When the form is submitted, you can use PHP to retrieve the selected sorting criteria and apply it to the data before displaying it to the user. 

<?php
// Assume $data is an array of data to be displayed

// Check if the form is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Retrieve the selected sorting criteria
    $sortingCriteria = $_POST["sorting_criteria"];

    // Sort the data based on the selected criteria
    if ($sortingCriteria == "name") {
        usort($data, function($a, $b) {
            return $a["name"] <=> $b["name"];
        });
    } elseif ($sortingCriteria == "date") {
        usort($data, function($a, $b) {
            return strtotime($a["date"]) <=> strtotime($b["date"]);
        });
    } elseif ($sortingCriteria == "price") {
        usort($data, function($a, $b) {
            return $a["price"] - $b["price"];
        });
    }
}

// Display the form for selecting sorting criteria
?>
<form method="post">
    <label for="sorting_criteria">Sort by:</label>
    <select name="sorting_criteria" id="sorting_criteria">
        <option value="name">Name</option>
        <option value="date">Date</option>
        <option value="price">Price</option>
    </select>
    <button type="submit">Sort</button>
</form>

<?php
// Display the sorted data
foreach ($data as $item) {
    // Display data here
}
?>

Keywords

PHP user input sorting criteria data display dynamic sorting

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