What steps can be taken to troubleshoot and debug issues related to missing variables in PHP code?

When troubleshooting missing variables in PHP code, the first step is to check for any typos or misspelled variable names. Next, ensure that the variable is properly initialized and assigned a value before it is used in the code. If the variable is coming from a form submission or external source, verify that it is being correctly passed to the PHP script. 

// Example code snippet to troubleshoot missing variables in PHP
if(isset($_POST['username'])) {
    $username = $_POST['username'];
} else {
    echo "Error: Username is missing";
}

Keywords

PHP debugging troubleshooting variables error_reporting

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