How can the order of variable assignments in PHP code affect the execution and output of a script?

The order of variable assignments in PHP code can affect the execution and output of a script when variables depend on each other's values. If a variable is assigned before another variable it depends on, it may lead to unexpected results or errors. To avoid this issue, make sure to assign variables in the correct order based on their dependencies.

// Incorrect order of variable assignments
$a = $b + 1;
$b = 2;

echo $a; // Output: 1 (incorrect)

// Correct order of variable assignments
$b = 2;
$a = $b + 1;

echo $a; // Output: 3 (correct)