I explained to you a multiple-selection elseif statement earlier. Although this statement can make multiple judgments, when used, it requires writing a lot of if statements, which brings inconvenience to the readability of our program. In order to avoid If there are too many if statements and to improve the readability of our program, we can use switch multiple judgment statements. In this chapter we will introduce the "switch statement" to you. Syntax of switch statement: switch (expr) { case expr1: statement; break; case expr2: &
1. 10 recommended articles about the usage of PHP conditional control statement examples
##Introduction: I explained to you a multiple-selection elseif statement earlier. Although this statement can be used for multiple judgments, when used, a lot of if statements need to be written to make our program more readable. In order to avoid too many if statements and improve the readability of our program, we can use switch multiple judgment statements. In this chapter, we will introduce the "switch statement" to you. The syntax of the switch statement: switch (expr){ case ...
2. Summary of code examples of elseif statements based on php
Introduction: I explained to you a multiple selection elseif statement earlier, although this statement can be Multiple judgments, but when used, we need to write a lot of if statements, which brings inconvenience to the readability of our program. In order to avoid too many if statements and improve the readability of our program, we can use switch multiple judgment statements. This chapter We will introduce to you the "switch statement". The syntax of the switch statement: switch (expr){ case ...
3. 10 recommended articles about elseif statements
Introduction: I explained to you a multiple selection elseif statement earlier, although this statement can be used for multiple selections. This kind of judgment, but when using it, we need to write a lot of if statements, which brings inconvenience to the readability of our program. In order to avoid too many if statements and improve the readability of our program, we can use switch multiple judgment statements. In this chapter we Let me introduce to you the "switch statement". The syntax of the switch statement: switch (expr){ case ...
4. 10 recommended articles about switch
Introduction: I explained to you a multiple selection elseif statement earlier, although this statement can be used in multiple ways. Judgment, but when using it, you need to write a lot of if statements, which brings inconvenience to the readability of our program. In order to avoid too many if statements and improve the readability of our program, you can use switch multiple judgment statements. In this chapter we will Let me introduce to you the "switch statement". The syntax of the switch statement: switch (expr){ case ...
5. 10 recommended articles about if conditional statements
Introduction: I explained to you a multiple selection elseif statement earlier, although this statement can be Multiple judgments, but when used, we need to write a lot of if statements, which brings inconvenience to the readability of our program. In order to avoid too many if statements and improve the readability of our program, we can use switch multiple judgment statements. This chapter We will introduce to you the "switch statement". The syntax of the switch statement: switch (expr){ case ...
简介:前面给大家讲解了一种多重选择elseif语句,虽然这种语句可以进行多种判断,但是使用的时候,需要写很多的if语句,给我们程序的可读性带来不便,为了避免if语句过多和提高我们程序的可读性,可以使用switch多重判断语句,本章我们就给大家介绍“switch语句”。
简介:之前我们学习了“if...else语句”,知道了我们的“if...else语句” 只能选择两种结果,不是真,就是假。但是当我们出现多个条件的时候,该怎么办呢?什么叫出现多个多件?举个例子来说明一下,假如,有一个班级考试,考试的成绩出来之后,老师划分:90分以上的,是成绩优秀;60-90分之间的,成绩良好,少于60分的,则是成绩不及格。在这种多个条件下,就需要用我们的“elseif语句”了。
简介:PHP页面//初始化act$_REQUEST['act']=$_REQUEST['act']?$_REQUEST['act']:'';if($_REQUEST['act']=='add'){ include 'templates/zhiliang_add.php'; }elseif($_REQUEST['act']=='insert'){ //文件上传
简介:<?php $n1=1000; $n2=1000; $n3=100; $n4=100; // if 语句 - 如果指定条件为真,则执行代码 // if...else 语句 - 如果条件为 true,则执行代码;如果条件为 false,则执行另一端代码 // if...elseif....else 语句 - 选择若干段代码块之一来执行 // switch 语句 ...
10. 一个取得客户端IP的函数
简介:<?phpfunctiontep_get_ip_address(){if(isset($_SERVER)){if(isset($_SERVER['HTTP_X_FORWARDED_FOR'])){$ip=$_SERVER['HTTP_X_FORWARDED_FOR'];}elseif
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php - if ...elseif...else...这样写错了吗,为什么不执行呢?
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