分支判断
// '单分支';$age = 17;if($age<18){ echo '未成年';};echo '<hr>';$age = 20;//双分支if($age<18){ echo '未成年';}else{ echo '成年啦';}echo '<hr>';//多分支$age = 50;if($age<18){ echo '未成年';}elseif($age<40){ echo '成年人';}else{ echo '老年人';}echo '<hr>';//语法糖//双分支语法糖 三元运算符echo $age<18 ? '未成年' : '成年了';echo '<hr>';//多分支语法糖switch$age = 70;switch(true){ case $age>18 && $age<=30: echo '年轻人'; break; case $age>30 && $age<=60: echo '中年人'; break; case $age>60: echo '老年人'; break; default: echo '未成年';};
循环输出模板
$shuju =[ ['id'=>1,'name'=>'安邦','age'=>18,'order'=>1, 'score'=>59 ], ['id'=>2,'name'=>'安福','age'=>18,'order'=>2, 'score'=>42 ], ['id'=>3,'name'=>'安歌','age'=>18,'order'=>3, 'score'=>61 ], ['id'=>4,'name'=>'安国','age'=>18,'order'=>4, 'score'=>73 ], ['id'=>5,'name'=>'安和','age'=>18,'order'=>5, 'score'=>89 ], ['id'=>6,'name'=>'安康','age'=>18,'order'=>6, 'score'=>46 ], ['id'=>7,'name'=>'安澜','age'=>18,'order'=>7, 'score'=>65 ], ['id'=>8,'name'=>'安民','age'=>18,'order'=>8, 'score'=>62 ], ['id'=>9,'name'=>'安宁','age'=>18,'order'=>9, 'score'=>52 ], ['id'=>10,'name'=>'安平','age'=>18,'order'=>10,'score'=>55], ['id'=>11,'name'=>'安然','age'=>18,'order'=>11,'score'=>88], ['id'=>12,'name'=>'安顺','age'=>18,'order'=>12,'score'=>60]];
<body> <table> <thead> <tr> <th>ID</th> <th>姓名</th> <th>年龄</th> <th>学号</th> <th>成绩</th> </tr> </thead> <tbody> <?php foreach($shuju as $v) : ?> <tr> <?php if($v['score']>=60):?> <td><?php echo $v['id']?></td> <td><?php echo $v['name']?></td> <td><?php echo $v['age']?></td> <td><?php echo $v['order']?></td> <td><?php echo $v['score']?></td> <?php endif?> </tr> <?php endforeach ?> </tbody> </table></body>
