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PHP流程控制（条件判断、循环和跳出流程语句）以及GET传值的练习 - 九期线上班
fkkf467
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919 people have browsed it

一、PHP条件判断

1. 三元运算符 ? : 

  1. <?php
  2.     $money = 100;
  3.     echo $money >= 100 ? '买糖' : '不买糖';
  4. ?>


2. if 

  1. <?php
  2. $money = 150;
  3. if ($money >= 100){
  4.     echo '出去耍';
  5. }
  6. ?>


3. if else 

  1. <?php
  2. $money = 10;
  3. if ($money >= 100){
  4.     echo '出去耍';
  5. }else{
  6.     echo '还是在家睡觉吧';
  7. }
  8. ?>


4. if elseif else 

  1. <?php
  2.     $score = 76;
  3.     if ($score == 100){
  4.         echo '满分';
  5.     }elseif ($score >= 80){
  6.         echo '优秀';
  7.     }elseif ($score >= 70){
  8.         echo '良好';
  9.     }elseif ($score >= 60){
  10.         echo '及格';
  11.     }else{
  12.         echo '不及格';
  13.     }
  14. ?>


5. switch case default 

  1. <?php
  2.     $score = 43;
  3.     switch ($score){
  4.         case 100:
  5.             echo '满分';
  6.             break;
  7.         case $score >= 90:
  8.             echo '优秀';
  9.             break;
  10.         case $score >= 70:
  11.             echo '良好';
  12.             break;
  13.         case $score >= 60:
  14.             echo '及格';
  15.             break;
  16.         default:
  17.             echo '不及格';
  18.             break;
  19.     }
  20. ?>

二、PHP循环

1. while 

  1. <?php
  2.     $i = 0;
  3.     while ($i < 10){
  4.         echo $i . '<hr>';
  5.         $i++;
  6.     }
  7. ?>

2. do while 

  1. <?php
  2.     $i = 1;
  3.     do{
  4.         echo $i;
  5.         echo '<hr>';
  6.         $i++;
  7.     }while($i<1);
  8. ?>


3. for 

  1. <?php
  2.     for ($i=0;$i<10;$i++) {
  3.         echo $i;
  4.         echo '<hr>';
  5.     }
  6. ?>

三、跳出流程语句

1. continue 

  1. <?php
  2.     for ($i=1;$i<10;$i++) {
  3.         if($i == 4){
  4.             continue;
  5.         }
  6.         echo $i;
  7.         echo '<hr>';
  8.     }
  9. ?>


2. break 

  1. <?php
  2.     for ($i=1;$i<10;$i++) {
  3.         if($i == 4){
  4.             break;
  5.         }
  6.         echo $i;
  7.         echo '<hr>';
  8.     }
  9. ?>


四、GET传值

  1. <!doctype html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <title>GET传值</title>
  6. </head>
  7. <body>
  8. <form action="" method="get">
  9.     <label for="email">邮箱:</label>
  10.     <input type="email" id="email" name="email" value="">
  11.     <br>
  12.     <label for="password">密码:</label>
  13.     <input type="password" id="password" name="password" value="">
  14.     <br>
  15.     <button>登录</button>
  16. </form>
  17. </body>
  18. </html>
  19. <?php
  20.     print_r($_GET);
  21.     echo '<br>';
  22.     echo $_GET['email'];
  23.     echo '<br>';
  24.     if (isset($_GET['password'])) {
  25.         echo $_GET['password'];
  26.     }else{
  27.         $_GET['password'] = '';
  28.     }
  29.     echo '<br>';
  30.     echo isset($_GET['email']) ? $_GET['email'] : '';
  31.     echo '<pre>';
  32.     print_r($_GET);
  33. ?>

五、综合练习

header.php 

  1. <?php
  2. $system = [
  3.     'name' => '影视大全',
  4.     'copy' => '猪小明'
  5. ];
  6. $cates = [
  7.     [
  8.         'cate_id' => 1,
  9.         'name' => 'rm',
  10.         'alias' => '热门'
  11.     ],
  12.     [
  13.         'cate_id' => 2,
  14.         'name' => 'zx',
  15.         'alias' => '最新'
  16.     ],
  17.     [
  18.         'cate_id' => 3,
  19.         'name' => 'dbgf',
  20.         'alias' => '豆瓣高分'
  21.     ],
  22.     [
  23.         'cate_id' => 4,
  24.         'name' => 'lmjp',
  25.         'alias' => '冷门佳片'
  26.     ],
  27.     [
  28.         'cate_id' => 5,
  29.         'name' => 'hy',
  30.         'alias' => '华语'
  31.     ],
  32.     [
  33.         'cate_id' => 6,
  34.         'name' => 'om',
  35.         'alias' => '欧美'
  36.     ],
  37.     [
  38.         'cate_id' => 7,
  39.         'name' => 'hg',
  40.         'alias' => '韩国'
  41.     ],
  42.     [
  43.         'cate_id' => 8,
  44.         'name' => 'rb',
  45.         'alias' => '日本'
  46.     ]
  47. ];
  48. $movies = [
  49.     [
  50.         'cate_id' => 1,
  51.         'mov_id' => 1,
  52.         'name' => '小丑',
  53.         'image' => 'rm1.jpg',
  54.         'video' => 'rm1.mp4',
  55.         'direct' => '托德·菲利普斯',
  56.         'write' => '托德·菲利普斯 斯科特·西尔弗',
  57.         'star' => '杰昆·菲尼克斯 罗伯特·德尼罗',
  58.         'type' => '剧情 惊悚 犯罪',
  59.         'area' => '加拿大 美国',
  60.         'language' => '英语',
  61.         'date' => '2019-10-04',
  62.         'length' => '122分钟',
  63.         'detail' => '电影《小丑》以同名DC漫画角色为基础，由华纳兄弟影业公司发行，计划于2019年10月4日上映。本片的故事将独立于DCEU之外，故事背景设置在20世纪80年代，讲述了一位生活陷入困境的脱口秀喜剧演员渐渐走向精神的崩溃，在哥谭市开始了疯狂的犯罪生涯，最终成为了蝙蝠侠的宿敌“小丑”的故事。'
  64.     ],
  65.     [
  66.         'cate_id' => 1,
  67.         'mov_id' => 2,
  68.         'name' => '小小的愿望',
  69.         'image' => 'rm2.jpg',
  70.         'video' => 'rm2.mp4',
  71.         'direct' => '田羽生',
  72.         'write' => '田羽生 大宽 大广',
  73.         'star' => '彭昱畅 王大陆 魏大勋',
  74.         'type' => '剧情 喜剧',
  75.         'area' => '中国大陆',
  76.         'language' => '汉语普通话',
  77.         'date' => '2019-09-12',
  78.         'length' => '107分钟',
  79.         'detail' => '突然患上肌肉萎缩症的高中生高远（彭昱畅 饰），被医生告知时日不多，决心在临死之前完成一个愿望，那就是成为一个真正的男人！得知这个消息的身边两位好兄弟徐浩（王大陆 饰）和张正阳（魏大勋 饰），为了兄弟最后的愿望，不惜一切奋战到底！'
  80.     ],
  81.     [
  82.         'cate_id' => 1,
  83.         'mov_id' => 3,
  84.         'name' => '最普通的恋爱',
  85.         'image' => 'rm3.jpg',
  86.         'video' => 'rm1.mp4',
  87.         'direct' => '金涵潔',
  88.         'write' => '金涵潔',
  89.         'star' => ' 金来沅 孔晓振 姜其永',
  90.         'type' => '喜剧 爱情',
  91.         'area' => '韩国',
  92.         'language' => '韩语',
  93.         'date' => '2019-10-02',
  94.         'length' => '109分钟',
  95.         'detail' => 'hanshi.tv电影《最普通的恋爱》将是一部浪漫喜剧,讲述30代男女间的现实爱情,将于今年冬季进行拍摄,预计将于2019年下半年于韩国上映。'
  96.     ],
  97.     [
  98.         'cate_id' => 1,
  99.         'mov_id' => 4,
  100.         'name' => '罗小黑战记',
  101.         'image' => 'rm4.jpg',
  102.         'video' => 'rm4.mp4',
  103.         'direct' => '木头',
  104.         'write' => '木头',
  105.         'star' => '山新 郝祥海 刘明月',
  106.         'type' => '动作 动画 奇幻',
  107.         'area' => '中国大陆',
  108.         'language' => '汉语普通话',
  109.         'date' => '2019-09-07',
  110.         'length' => '101分钟',
  111.         'detail' => '在熙攘的人类世界里，很多妖精隐匿其中，他们与人类相安无事地生活着。猫妖罗小黑因为家园被破坏，开始了它的流浪之旅。这场旅途中惺惺相惜的妖精同类与和谐包容的人类伙伴相继出现，让小黑陷入了两难抉择，究竟何处才是真正的归属？'
  112.     ],
  113.     // 省略部分
  114. ];
  115. ?>
  116. <!doctype html>
  117. <html lang="en">
  118. <head>
  119.     <meta charset="UTF-8">
  120.     <title><?php echo $system['name'];?></title>
  121.     <link rel="stylesheet" href="static/css/style.css">
  122. </head>
  123. <body>
  124. <header>
  125.     <div class="nav">
  126.         <a href="index.php">首页</a>
  127.         <?php
  128.             foreach ($cates as $cate) {
  129.                 echo "<a href='list.php?cate_id=" . $cate['cate_id'] . "'>{$cate['alias']}</a>";
  130.             }
  131.         ?>
  132.     </div>
  133. </header>
  134. <main>

footer.php 

  1. <?php
  2. $system = [
  3.     'name' => '影视大全',
  4.     'copy' => '猪小明'
  5. ];
  6. ?>
  8. </main>
  9. <footer>
  10.     <p><?php echo $system['copy'];?> &copy; 版权所有</p>
  11. </footer>
  12. </body>
  13. </html>

index.php 

  1. <?php
  2. include __DIR__ . '/header.php';
  4. foreach ($cates as $cate) {
  5.     echo "<article><h3>{$cate['alias']}</h3><ul>";
  6.     $i = 0;
  7.     foreach ($movies as $movie) {
  8.         if ($movie['cate_id'] === $cate['cate_id']) {
  9.             $i++;
  10.             echo "<li><a href='detail.php?mov_id=" . $movie['mov_id'] . "'><img src='static/images/" . $movie['image'] . "' alt=''><span>{$movie['name']}<i>8.9</i></span></a></li>";
  11.             if ($i == 5) {
  12.                 echo '</ul><ul>';
  13.             }
  14.         }
  15.     }
  16.     echo '</ul></article>';
  17. }
  19. include __DIR__ . '/footer.php';


list.php 

  1. <?php
  2. include __DIR__ . '/header.php';
  4.     $cate_id = intval($_GET['cate_id']);
  5.     foreach ($cates as $cate) {
  6.         if ($cate_id === $cate['cate_id']) {
  7.             echo "<article><h3>{$cate['alias']}</h3><ul>";
  8.             $i = 0;
  9.             foreach ($movies as $movie) {
  10.                 if ($movie['cate_id'] === $cate['cate_id']) {
  11.                     $i++;
  12.                     echo "<li><a href='detail.php?mov_id=" . $movie['mov_id'] . "'><img src='static/images/" . $movie['image'] . "' alt=''><span>{$movie['name']}<i>8.9</i></span></a></li>";
  13.                     if ($i == 5) {
  14.                         echo '</ul><ul>';
  15.                     }
  16.                 }
  17.             }
  18.             echo '</ul></article>';
  19.         }
  20.     }
  22. include __DIR__ . '/footer.php';


detail.php 

  1. <?php
  2. include __DIR__ . '/header.php';
  3. $mov_id = intval($_GET['mov_id']);
  5.     foreach ($movies as $movie) {
  6.         if ($mov_id === $movie['mov_id']){
  7.             echo "<h2>{$movie['name']}</h2>";
  8.             echo '<div class="video">';
  9.             echo '<video src="static/video/' . $movie['video'] . '" autoplay="autoplay" controls="controls" width="800"></video><ul>';
  10.             echo '<li><span>导演：</span><a href="">' . $movie['direct'] . '</a></li>';
  11.             echo '<li><span>编剧：</span><a href="">' . $movie['write'] . '</a></li>';
  12.             echo '<li><span>主演：</span><a href="">' . $movie['star'] . '</a></li>';
  13.             echo '<li><span>类型：' . $movie['type'] . '</span></li>';
  14.             echo '<li><span>地区：' . $movie['area'] . '</span></li>';
  15.             echo '<li><span>语言：' . $movie['language'] . '</span></li>';
  16.             echo '<li><span>上映时间：' . $movie['date'] . '</span></li>';
  17.             echo '<li><span>时长：' . $movie['length'] . '</span></li></ul></div><div class="detail">';
  18.             echo "<h2>{$movie['name']}的剧情简介 · · · · · ·</h2><p>{$movie['detail']}</p></div>";
  19.         }
  20.     }
  22. include __DIR__ . '/footer.php';

六、总结

学会了php的判断和循环，还掌握了GET传值。

Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：完成的很好,希望把学习重点放在代码执行逻辑上, 而不是样式上
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