PHP if...else...elseif statement

English explanation:

Chinese explanation: if

Chinese explanation: Otherwise

##PHP conditional statement

In PHP, we can use the following conditional statements:

· if statement - If the specified condition is true, the code is executed

· if ...else statement - if the condition is true, execute the code; if the condition is false, execute the other end of the code

· if...elseif....else statement - select one of several code blocks To execute

· switch statement - statement one of multiple code blocks to execute

PHP - if statement

if statement is used to specify a condition Execute code when true.

Syntax

##if(

) { Execute when the condition is true

}

##Example

<?php
 $sun=100;
 if($sun>90){
     echo "100>90";
 }
 ?>

##if. . .else statement

## Use the if....else statement to execute code when a condition is true and another section of code when the condition is false. Syntax

Condition){

Execute when the condition is true

Example

<?php
 $sun=110;
 if($sun>200){
     echo "$sun>200";
 }else{
     echo "$sun<200";
 }
 ?>

##

if...elseif....else statement

Syntax

if(Condition 1 ) {

## Execute when condition 1 is true

Condition 2) {

Executed when the conditions are not met

Example

<?php
 header("Content-type:text/html;charset=utf-8");    //设置编码
 $sun=150;
 if($sun>200){
     echo "满足条件1";
 }elseif($sun<180){
     echo "满足条件2";
 }else{
     echo "都不满足条件";
 }
 ?>

PHP - switch statement
We will learn the switch statement in the next section.