How can one effectively debug PHP scripts to identify and resolve issues related to session variables not being set or read correctly?

To effectively debug PHP scripts related to session variables not being set or read correctly, you can start by checking if the session_start() function is called at the beginning of the script and ensure that there are no output statements before it. Additionally, you can use var_dump($_SESSION) to inspect the session data and see if the variables are being set correctly. 

<?php
session_start();

// Check if session variable is set
if(isset($_SESSION['variable_name'])) {
    // Read session variable
    $value = $_SESSION['variable_name'];
    echo "Session variable value: " . $value;
} else {
    echo "Session variable not set";
}
?>

Keywords

PHP debugging session variables error handling troubleshooting

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