switch ($url) { case “https://www.example.com/home”: // 执行首页逻辑 break; case “https://www.example.com/products”: // 执行产品列表逻辑 break; case “https://www.example.com/about”: // 执行关于逻辑 break; default: // 执行默认逻辑 } “` 总结:使用switch语句可以让我们根据不同...
仅当一个case语句中的值和switch表达式的值匹配时 PHP 才开始执行语句,直到switch的程序段结束或者遇到第一个break语句为止。如果不在 case 的语句段最后写上break的话,PHP 将继续执行下一个 case 中的语句段。例如: <?php switch ($i) { case0: echo"i equals 0"; case1: echo"i equals 1"; case2:...
switch 语句一行接一行地执行(实际上是语句接语句)。开始时没有代码被执行。仅当一个 case 语句中的值和 switch 表达式的值匹配时 PHP 才开始执行语句,直到 switch 的程序段结束(如 return 语句)或者遇到第一个 break 语句为止。如果不在 case 的语句段最后写上 break 的话,PHP 将继续执行下一个 case 中的...
This is done by providing a numeric argument tocontinueto tell it how many levels of enclosing loops should be skipped – and it counts the switch statement as a loop for this purpose. For example: $array = [1, 2, 3]; foreach($array as $vartem) { switch($vartem) { case 1: ech...
This example demonstrates the PHP switch statement with characters.<?php $grade = "B"; switch ($grade) { case "A": echo "Excellent!"; break; case "B": echo "Good job!"; break; case "C": echo "You passed."; break; default: echo "Invalid grade."; } ?> ...
ExampleRun this code » <?php $today = date("D"); switch($today){ case "Mon": echo "Today is Monday. Clean your house."; break; case "Tue": echo "Today is Tuesday. Buy some food."; break; case "Wed": echo "Today is Wednesday. Visit a doctor."; break; case "Thu": ...
Example If no cases get a match, thedefaultblock is executed: $d=4;switch($d){case6:echo"Today is Saturday";break;case0:echo"Today is Sunday";break;default:echo"Looking forward to the Weekend";} Try it Yourself » Thedefaultcase does not have to be the last case in a switch bloc...
";}$favcolor="red";switch($favcolor){case"red":echo"Your favorite color is red!";break;case"blue":echo"Your favorite color is blue!";break;case"green":echo"Your favorite color is green!";break;default:echo"Your favorite color is neither red, blue, or green!";}//循环$i=1;while...
要将JSON格式化输出,可以使用PHP内置的json_encode()函数来实现。 步骤如下: 1. 创建一个关联数组或对象,将需要输出的数据存储在其中。 “` $data = array( ‘name’ => ‘John Doe’, ‘age’ => 30, ’email’ => ‘johndoe@example.com’ ...
PHP的控制结构包括if、else、elseif、switch、case、while、do while、for、foreach、try和catch。如果这些关键词后面有一对原括号,开始括号前必须有一个空格,与方法和类的定义体不同,控制结构关键词后面的起始括号应该和控制结构关键词写在同一行,例如: