收藏
PHPz批改状态：合格
老师批语：
$age = 18;if($age >=18){echo '恭喜，你已成年，游戏时长不受限制';}//输出结果：恭喜。你已成年，游戏时长不受限制
$age = 15;if($age >= 18){echo '恭喜，你已成年，游戏时长不受限制';}else{echo '你未成年，游戏时长为2小时';}//输出结果：你未成年，游戏时长为2小时
$age = 20;if($age >= 18 && $age <30){echo $age.'岁,游戏时长没限制';}else if( $age >= 30 && $age < 45){echo $age.'岁，少玩点游戏';}else if($age>=45){echo $age.'岁，别玩游戏了，出去走走吧';}else{echo $age.'岁，别玩游戏，多陪陪家人';}//输出结果：20岁，游戏不受限制
$age = 15;switch(true){case $age >= 18 && $age <30:echo $age.'岁,游戏时长没限制';break;case $age >= 30 && $age < 45:echo $age.'岁，少玩点游戏';break;case $age>=45:echo $age.'岁，别玩游戏了，出去走走吧';break;default:echo $age.'岁，别玩游戏，多陪陪家人';}//输出结果：15岁，别玩游戏，陪陪家人
$colors = ['red','green','blue'];$list = '<ul style="border:1px solid;background:lightcyan">';$i = 0;while($i<count($colors)){$list .= '<li>{$colors[$i]}</li>';$i =$i + 1;}$list .= </ul>;echo $list;
$colors = ['red','green','blue'];$list = '<ul style="border:1px solid;background:lightcyan">';$i = 0;do{$list .= '<li>{$colors[$i]}</li>';$i =$i + 1;}while($i<count($colors));$list .= </ul>;echo $list;
$colors = ['red','green','blue'];$list = '<ul style="border:1px solid;background:violet">';for($i = 0 ; $i< count($colors);$i++){$list .= "<li>{$colors[$i]}</li>";}$list .= </ul>;echo $list;
<?php$stus = [['id' => 1, 'name' => '刘备', 'course' => 'js', 'score' => 83],['id' => 2, 'name' => '关羽', 'course' => 'php', 'score' => 75],['id' => 3, 'name' => '张飞', 'course' => 'js', 'score' => 52],['id' => 4, 'name' => '孙权', 'course' => 'php', 'score' => 88],['id' => 5, 'name' => '周瑜', 'course' => 'js', 'score' => 65],['id' => 6, 'name' => '孔明', 'course' => 'php', 'score' => 53],['id' => 7, 'name' => '赵云', 'course' => 'js', 'score' => 63],['id' => 8, 'name' => '马超', 'course' => 'js', 'score' => 77],['id' => 9, 'name' => '姜维', 'course' => 'php', 'score' => 93],['id' => 10, 'name' => '黄忠', 'course' => 'js', 'score' => 81],]?><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>PHP与HTML混编</title><style>table {border-collapse: collapse;width: 360px;text-align: center;}table th,table td {border: 1px solid #000;padding: 5px;}table caption {font-size: 1.3em;}table thead {background-color: lightcyan;}.active {color: red;}</style></head><body><table><caption>学生成绩表</caption><thead><tr><th>ID</th><th>姓名</th><th>课程</th><th>成绩</th></tr></thead><tbody><?phpforeach($stus as $stu){// echo "<tr>";// echo "<td>{$stu['id']}</td>";// echo "<td>{$stu['name']}</td>";// echo "<td>{$stu['course']}</td>";// echo "<td>{$stu['score']}</td>";// heredoc, 写模板, 可以解析内部变量echo <<< STU<tr><td>{$stu['id']}</td><td>{$stu['name']}</td><td>{$stu['course']}</td><td>{$stu['score']}</td></tr>STU;//!只查某种元素// if($stu['course']==='php'){// echo <<< STU// <tr>// <td>{$stu['id']}</td>// <td>{$stu['name']}</td>// <td>{$stu['course']}</td>// <td>{$stu['score']}</td>// </tr>// STU;// }}?></tbody></table></body></html>
Copyright 2014-2025 https://www.php.cn/ All Rights Reserved | php.cn | 湘ICP备2023035733号
