In the provided PHP code snippet, what could be the possible reasons for the statement not working as expected?

The possible reasons for the statement not working as expected could be due to incorrect syntax, missing variables or functions, or logic errors in the code. To solve this issue, carefully review the code for any syntax errors, ensure all variables and functions are properly defined and called, and debug the logic to identify any errors.

// Incorrect statement that is not working as expected
$number = 10;
if ($number = 10) {
    echo "Number is 10";
}

// Corrected statement using comparison operator '=='
$number = 10;
if ($number == 10) {
    echo "Number is 10";
}