Detailed explanation and examples - double branch structure (with source code)

The last article introduced you to "Implementation steps - single branch structure (with source code)". This article continues to introduce you to the double branch structure, so let us continue to learn! ! ! Let's Go!!!

Double branch structure:

Format 1:

if (conditional statement)

A PHP statement

else

A PHP statement

• The double branch is to add an else branch based on the single branch

• If the conditional expression turns out to be true, the first PHP after if will be executed Code

• If the conditional expression result is false, the first day PHP code after else will be executed

• The code after if is called if interval or true interval

• The code after else is called else interval or false interval

Format 2:

if (conditional expression) {

One PHP statement

Two PHP statements

...

}else{

One PHP statement

Two PHP statements

...

}

## If used, generally use the {} format version, because {} is more readable and less likely to be confused, and the functions of format 2 already include the functions of format 1. A PHP statement can be written within {}.

We take the code as an example for the specific format. The code is as follows:

<?php 
/******双项分支结构 ******/
//定义一个变量
$pome = &#39;有一个奇葩&#39;;
if($pome == &#39;有一个奇葩&#39;)
       echo &#39;在我周围有一个从未见过的厚颜无耻之人<br/>&#39;;
    else 
       echo &#39;看见他很不爽<br/>&#39;;
       echo &#39;你懂的？<br/>&#39;;
       

       //格式2
 $pome = &#39;你知道他是谁吗&#39;;
 if($pome == &#39;你知道他是谁吗&#39;)   {
     echo &#39;风光的背后不是沧桑，是肮脏<br/>&#39;;
     echo &#39;你身边有奇葩的人吗<br/>&#39;;
 }else{
     echo &#39;没办法，碰到就忍着吧，昂！<br/>&#39;;
 }   
?>

The running results are as follows:

Recommended learning: "

PHP video tutorial》

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