How can debugging techniques be used to identify issues with PHP variable assignments?

When debugging PHP variable assignments, one common issue is mistakenly using the assignment operator "=" instead of the comparison operator "==" or "===" when checking conditions. To identify and fix this issue, you can use debugging techniques such as printing the variable values before and after the assignment statement to see if they are as expected.

// Incorrect assignment
$number = 10;
if($number = 10) {
    echo "Number is 10";
}

// Correct comparison
$number = 10;
if($number == 10) {
    echo "Number is 10";
}