Do you know the advanced use of str_replace in PHP?

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You should know about the advanced use of str_replace

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There are many things in the process of reading the source code of the PHP framework ThinkPHP Unpopular uses of methods, that is, methods that are not commonly used.

Here Kaka first parses the str_replace method, which is to replace some characters in the string (case-sensitive).

Let’s first look at a commonly used case

You should all know what results will be returned when accessing this controller, that is Will change all the world in Hello world! to Peter

The next step is to perform a case upgrade, please see the picture below

In this case, the data to be searched is an array, and function replacement is also applicable.

In the return result, you can see that the total number of substitutions is output.

Of course what Kaka wants to explain to you today is not these two usage methods, but the case below, please see The figure below

In this case, the value to be found and the value to be replaced are both arrays.

I don’t know if you have used this method before. Kaka has never used it before. This method of use was discovered by Kaka in the reading frame source code.

Return Result

You can also see in the return result that the replacement has been made. Method acquisition is rarely used in the development process, but you still need to be aware of its usage.

is used in the framework source code like this. This case is exactly the same as the third case demonstrated by Kaka. of.

It’s just that this is what the framework source code does when generating SQL statements.

The above is about the simple use of str_replace

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Persistence in learning, persistence in blogging, and persistence in sharing are the beliefs that Kaka has always upheld since his career. I hope that Kaka’s articles on the huge Internet can bring you a little bit of help. I’m Kaka, see you next time.

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