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// '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';};
$shuju =[['id'=>1,'name'=>'安邦','age'=>18,'order'=>1, 'score'=>59 ],['id'=>2,'name'=>'安福','age'=>18,'order'=>2, 'score'=>42 ],['id'=>3,'name'=>'安歌','age'=>18,'order'=>3, 'score'=>61 ],['id'=>4,'name'=>'安国','age'=>18,'order'=>4, 'score'=>73 ],['id'=>5,'name'=>'安和','age'=>18,'order'=>5, 'score'=>89 ],['id'=>6,'name'=>'安康','age'=>18,'order'=>6, 'score'=>46 ],['id'=>7,'name'=>'安澜','age'=>18,'order'=>7, 'score'=>65 ],['id'=>8,'name'=>'安民','age'=>18,'order'=>8, 'score'=>62 ],['id'=>9,'name'=>'安宁','age'=>18,'order'=>9, 'score'=>52 ],['id'=>10,'name'=>'安平','age'=>18,'order'=>10,'score'=>55],['id'=>11,'name'=>'安然','age'=>18,'order'=>11,'score'=>88],['id'=>12,'name'=>'安顺','age'=>18,'order'=>12,'score'=>60]];
<body><table><thead><tr><th>ID</th><th>姓名</th><th>年龄</th><th>学号</th><th>成绩</th></tr></thead><tbody><?php foreach($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>