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This article mainly shows you "how to test PHP script", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "how to test PHP script" this article.

1. Common test examples

We often encounter this situation: some legacy code that has not been tested is rewritten, even if it is written in object-oriented. To test such code, my advice is to break the code into blocks so that it is easy to test.

However, the legacy code is not so easy to ReFactor, for example, you can't rewrite the code before testing, in order to avoid affecting the original program, and certainly not good for unit testing.

In PHP programs, part of the code is usually written in several index.php and script.php files, which are stored in several different folders. If their entry points are not found, they cannot be accessed directly by the Web server.

Test copy

To test a PHP script, we need to simulate a HTTP request and check that the returned response (response) is equal to the expected value. It is important to note that to simulate a request, to define response and request, not only is the content (content) different, but their header information (header) is also different.

In addition, if we want to test a transaction script that manipulates data, we need to make sure that it does not connect to the real database or the rest of the application.

In reality, usually no one will rewrite the original PHP script directly. For fear of making the code unrecoverable. I suggest using a copy of the PHP script so that we can perform some minor operations on the PHP code.

How to make minimal changes to the code: delete the include and require statements (if they are not used), and modify how internal functions are called, such as writing header () as $object- > header ().

Finally, let's test the transaction script. After testing, we can extract them from the copy script and put them in the new script file.

Concrete steps

First, simulate a HTTP request and redefine the variables $_ GET and $_ POST, and modify the header of $_ SERVER.

Second, to get the request response, the body of response can be captured by ob_start () and ob_get_clean (). It can collect each with echo () or with

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