How to use return statements in php

This article mainly introduces the relevant knowledge of "how to use return sentences in php". The editor shows you the operation process through an actual case. The operation method is simple, fast and practical. I hope this article "how to use return sentences in php" can help you solve the problem.

1. Description

(1) return exits from the current method, returns to the statement of the calling method, and continues execution.

(2) return returns a value to the statement that calls the method, and the data type of the return value must be the same as the type of the return value in the method declaration.

(3) return can also be followed by no parameters, no parameters is to return empty, in fact, the main purpose is to interrupt the function execution and return to the calling function.

two。 Attention to use

Return parameters. It is recommended that you do not add parentheses. Because return is a language structure rather than a function, its arguments usually do not use parentheses, and in fact they should not be used, which reduces the burden on PHP.

When no parameter is returned, it must be returned without parentheses. Because when no parameter is returned, NULL is returned by default. Parsing errors can occur if you call return with parentheses but no arguments.

3. Example

In the method of jumping out of the loop, we have learned the common use, this article needs to introduce a language structure return. When we learn about other programming, generally speaking, return is used as a function, but if you put it in a php statement, you can't use the function.

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