How can debugging techniques be used to identify and resolve issues related to variable overwriting in PHP scripts?

Variable overwriting in PHP scripts can occur when the same variable name is used multiple times within the same scope, causing the value of the variable to be overwritten. To identify and resolve this issue, debugging techniques such as using print statements or var_dump() can be used to track the value of the variable at different points in the script. To fix the issue, ensure that each variable has a unique name within its scope or use arrays or objects to store related values.

// Incorrect variable overwriting
$number = 5;
$number = 10;

// Correct usage with unique variable names
$number1 = 5;
$number2 = 10;

// Using arrays to store related values
$numbers = array(5, 10);