How to use switch in php

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

This article operating environment: windows7 system, PHP7.1 version, DELL G3 computer

What is the use of php switch?

PHP Switch statement

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

Recommended study: "PHP Video tutorial"

Example

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