How can test code be activated or deactivated in PHP projects without executing it?

To activate or deactivate test code in PHP projects without executing it, you can use conditional statements to control whether the code should run or not based on a specific condition or flag. By setting a variable or constant to indicate whether testing mode is active, you can easily enable or disable the test code without changing the code itself.

// Set a variable to indicate whether testing mode is active
$testingMode = true;

// Check if testing mode is active before running test code
if ($testingMode) {
    // Test code to be executed
    echo "Test code is running...";
}