What are the recommended debugging techniques for troubleshooting PHP form submission issues?

Issue: When troubleshooting PHP form submission issues, it is recommended to check for errors in the form action URL, form method, form field names, and PHP code handling the form data. 

<?php
if($_SERVER["REQUEST_METHOD"] == "POST") {
    // Check if form fields are set and not empty
    if(isset($_POST['field1']) && !empty($_POST['field1'])) {
        $field1 = $_POST['field1'];
        // Process the form data here
    } else {
        echo "Field1 is required";
    }
}
?>

<form method="post" action="<?php echo $_SERVER['PHP_SELF']; ?>">
    <input type="text" name="field1">
    <button type="submit">Submit</button>
</form>

Keywords

Xdebug var_dump error_reporting $_POST PHPStorm

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