How can the issue of echoing unexpected values in PHP variables, such as $ein, be resolved through proper debugging techniques?

To resolve the issue of echoing unexpected values in PHP variables like $ein, you should first ensure that the variable is being assigned the correct value. You can use debugging techniques such as printing the variable value using echo or var_dump to inspect its contents. Additionally, check for any typos or errors in variable names that might be causing the unexpected values to be echoed.

$ein = 123; // Assign the correct value to the variable
echo $ein; // Use echo to print the variable value for debugging