What is the error message "Can't use function return value in write context" typically indicating in PHP?

The error message "Can't use function return value in write context" typically indicates that a function that returns a value is being used in a context where a variable is expected to be modified. This error often occurs when trying to assign a value to a function's return value directly, which is not allowed in PHP. To solve this issue, you should store the function's return value in a variable first and then use that variable in the desired context.

// Incorrect usage causing the error
// $result = myFunction() = 5;

// Correct way to fix the issue
$result = myFunction();
$result = 5;