How can PHP developers troubleshoot issues related to $_POST data retrieval?

When troubleshooting issues related to $_POST data retrieval in PHP, developers can start by checking if the form method is set to "post" and if the form action points to the correct PHP file. They can also use var_dump($_POST) to see the structure of the $_POST data being sent. Additionally, developers should ensure that the form inputs have the correct name attributes that correspond to the keys in the $_POST array. 

<form method="post" action="process_form.php">
    <input type="text" name="username">
    <input type="password" name="password">
    <button type="submit">Submit</button>
</form>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    var_dump($_POST);
    $username = $_POST['username'];
    $password = $_POST['password'];
    // Further processing of the form data
}
?>

Keywords

$_POST data retrieval troubleshooting debugging error handling

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