What potential issues can arise when reusing mySQL variables multiple times in PHP?

One potential issue that can arise when reusing mySQL variables multiple times in PHP is that the previous value might still be stored in the variable, leading to unexpected results or errors in subsequent queries. To solve this issue, you should unset or reassign the variable before reusing it to ensure that it contains the correct value for the new query.

// Unset or reassign the variable before reusing it
unset($variable);
// OR
$variable = $new_value;