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This article mainly introduces the relevant knowledge of "what is the working principle of switch sentence 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 "what is the working principle of switch sentence in php" can help you solve the problem.

The switch statement in php is used to perform different actions based on different conditions, and its syntax is "switch (expression) {case label1:expression = label1 break;case label2:...}".

This article operating environment: Windows7 system, PHP7.1 version, DELL G3 computer

What is the meaning of switch statement in php?

Switch statements are used to perform different actions based on different conditions.

Switch statement

If you want to selectively execute one of several code blocks, use the Switch statement.

Long blocks of if..elseif..else code can be avoided by using Switch statements.

Grammar

Code executed when switch (expression) {case label1: expression = label1; code executed when break; case label2: expression = label2; break;default: the value of the expression is not equal to the code executed when label1 and label2;}

How it works:

Evaluate an expression (usually a variable) once

Compare the value of the expression with the value of case in the structure

If there is a match, execute the code associated with the case

After the code is executed, the break statement prevents the code from jumping into the next case to continue execution

If no case is true, use the default statement

Example

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