How can variable placement affect the outcome of a PHP script?

Variable placement in a PHP script can affect the outcome because variables need to be defined before they are used. If a variable is used before it is defined, it will result in an error or unexpected behavior. To solve this issue, make sure to define variables before using them in the script.

// Incorrect variable placement
echo $name;
$name = "John Doe";

// Correct variable placement
$name = "John Doe";
echo $name;