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This article mainly shows you "what are the methods of checking null values in PHP", the content is simple and clear, and I hope it can help you solve your doubts. Let me lead you to study and learn this article "what are the methods of checking null values in PHP?"

1. Use empty () to detect whether the variable is empty.

2. Use isset () to determine whether the variable has been initialized, which can be used to test whether the variable has been configured.

3. Use is_null () to detect whether the variable is null.

4. You can use var = = null to determine whether the variable is empty.

The above is all the contents of the article "what are the ways to check null values in PHP". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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