How can the issue of a white bar between the address bar and the PHP script be debugged using browser developer tools?

The white bar between the address bar and the PHP script can be caused by unintended whitespace or output before the PHP script starts executing. To debug this issue using browser developer tools, inspect the network tab to see if any additional content is being sent before the PHP script. Check the PHP script for any whitespace or output outside of the PHP tags. 

<?php
// Ensure there is no whitespace or output before the PHP script starts
ob_start(); // Start output buffering
?>
<!DOCTYPE html>
<html>
<head>
    <title>Debugging White Bar Issue</title>
</head>
<body>
    <?php
    // Your PHP script logic here
    ?>
</body>
</html>
<?php
ob_end_flush(); // Flush output buffer
?>

Keywords

PHP browser developer tools debugging white bar CSS.

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