The compression_test() WordPress PHP function tests if JavaScript compression from PHP is working as expected. It outputs JavaScript and sets an option with the result. This function only works when the current user is an administrator. To rerun the test, the option ‘can_compress_scripts’ must be deleted.
Usage
Here’s a straightforward example of how to use the compression_test() function:
compression_test();
Since compression_test() doesn’t take any parameters, just call it like this. It will run the compression test and set an option with the result.
Parameters
- None
More Information
See WordPress Developer Resources: compression_test()
This function is typically used by administrators to ensure that their WordPress installation can properly compress JavaScript files.
Examples
Running the Compression Test
The compression_test() function is straightforward to use. Let’s look at some different scenarios:
Scenario 1: Simple Use
If you’re an administrator and you simply want to test if your WordPress installation can compress JavaScript files, you just need to call the function.
compression_test(); // runs the compression test
Scenario 2: Checking the Result
After running the compression test, you might want to check the result. You can do this with the get_option() function.
compression_test();
$result = get_option('can_compress_scripts'); // gets the result of the compression test
echo $result;
Scenario 3: Running the Test Again
If you want to run the test again, you need to delete the ‘can_compress_scripts’ option before calling compression_test() again.
delete_option('can_compress_scripts'); // deletes the option
compression_test(); // runs the compression test again
Scenario 4: Conditional Testing
You might want to only run the test if the ‘can_compress_scripts’ option doesn’t exist. This is how you can do that:
if (!get_option('can_compress_scripts')) { // checks if the option exists
compression_test(); // runs the test if the option doesn't exist
}
Scenario 5: Displaying a Message Based on the Result
After running the test, you might want to display a message based on the result. Here’s how to do that:
compression_test();
$result = get_option('can_compress_scripts'); // gets the result of the compression test
if ($result) {
echo "Compression is working!";
} else {
echo "Compression is not working.";
}