一、PHP条件判断
1. 三元运算符 ? :
<?php$money = 100;echo $money >= 100 ? '买糖' : '不买糖';?>
2. if
<?php$money = 150;if ($money >= 100){echo '出去耍';}?>
3. if else
<?php$money = 10;if ($money >= 100){echo '出去耍';}else{echo '还是在家睡觉吧';}?>
4. if elseif else
<?php$score = 76;if ($score == 100){echo '满分';}elseif ($score >= 80){echo '优秀';}elseif ($score >= 70){echo '良好';}elseif ($score >= 60){echo '及格';}else{echo '不及格';}?>
5. switch case default
<?php$score = 43;switch ($score){case 100:echo '满分';break;case $score >= 90:echo '优秀';break;case $score >= 70:echo '良好';break;case $score >= 60:echo '及格';break;default:echo '不及格';break;}?>
二、PHP循环
1. while
<?php$i = 0;while ($i < 10){echo $i . '<hr>';$i++;}?>
2. do while
<?php$i = 1;do{echo $i;echo '<hr>';$i++;}while($i<1);?>
3. for
<?phpfor ($i=0;$i<10;$i++) {echo $i;echo '<hr>';}?>
三、跳出流程语句
1. continue
<?phpfor ($i=1;$i<10;$i++) {if($i == 4){continue;}echo $i;echo '<hr>';}?>
2. break
<?phpfor ($i=1;$i<10;$i++) {if($i == 4){break;}echo $i;echo '<hr>';}?>
四、GET传值
<!doctype html><html lang="en"><head><meta charset="UTF-8"><title>GET传值</title></head><body><form action="" method="get"><label for="email">邮箱:</label><input type="email" id="email" name="email" value=""><br><label for="password">密码:</label><input type="password" id="password" name="password" value=""><br><button>登录</button></form></body></html><?phpprint_r($_GET);echo '<br>';echo $_GET['email'];echo '<br>';if (isset($_GET['password'])) {echo $_GET['password'];}else{$_GET['password'] = '';}echo '<br>';echo isset($_GET['email']) ? $_GET['email'] : '';echo '<pre>';print_r($_GET);?>
五、综合练习
header.php
<?php$system = ['name' => '影视大全','copy' => '猪小明'];$cates = [['cate_id' => 1,'name' => 'rm','alias' => '热门'],['cate_id' => 2,'name' => 'zx','alias' => '最新'],['cate_id' => 3,'name' => 'dbgf','alias' => '豆瓣高分'],['cate_id' => 4,'name' => 'lmjp','alias' => '冷门佳片'],['cate_id' => 5,'name' => 'hy','alias' => '华语'],['cate_id' => 6,'name' => 'om','alias' => '欧美'],['cate_id' => 7,'name' => 'hg','alias' => '韩国'],['cate_id' => 8,'name' => 'rb','alias' => '日本']];$movies = [['cate_id' => 1,'mov_id' => 1,'name' => '小丑','image' => 'rm1.jpg','video' => 'rm1.mp4','direct' => '托德·菲利普斯','write' => '托德·菲利普斯 斯科特·西尔弗','star' => '杰昆·菲尼克斯 罗伯特·德尼罗','type' => '剧情 惊悚 犯罪','area' => '加拿大 美国','language' => '英语','date' => '2019-10-04','length' => '122分钟','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。'],['cate_id' => 1,'mov_id' => 2,'name' => '小小的愿望','image' => 'rm2.jpg','video' => 'rm2.mp4','direct' => '田羽生','write' => '田羽生 大宽 大广','star' => '彭昱畅 王大陆 魏大勋','type' => '剧情 喜剧','area' => '中国大陆','language' => '汉语普通话','date' => '2019-09-12','length' => '107分钟','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！'],['cate_id' => 1,'mov_id' => 3,'name' => '最普通的恋爱','image' => 'rm3.jpg','video' => 'rm1.mp4','direct' => '金涵潔','write' => '金涵潔','star' => ' 金来沅 孔晓振 姜其永','type' => '喜剧 爱情','area' => '韩国','language' => '韩语','date' => '2019-10-02','length' => '109分钟','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。'],['cate_id' => 1,'mov_id' => 4,'name' => '罗小黑战记','image' => 'rm4.jpg','video' => 'rm4.mp4','direct' => '木头','write' => '木头','star' => '山新 郝祥海 刘明月','type' => '动作 动画 奇幻','area' => '中国大陆','language' => '汉语普通话','date' => '2019-09-07','length' => '101分钟','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？'],// 省略部分];?><!doctype html><html lang="en"><head><meta charset="UTF-8"><title><?php echo $system['name'];?></title><link rel="stylesheet" href="static/css/style.css"></head><body><header><div class="nav"><a href="index.php">首页</a><?phpforeach ($cates as $cate) {echo "<a href='list.php?cate_id=" . $cate['cate_id'] . "'>{$cate['alias']}</a>";}?></div></header><main>
footer.php
<?php$system = ['name' => '影视大全','copy' => '猪小明'];?></main><footer><p><?php echo $system['copy'];?> © 版权所有</p></footer></body></html>
index.php
<?phpinclude __DIR__ . '/header.php';foreach ($cates as $cate) {echo "<article><h3>{$cate['alias']}</h3><ul>";$i = 0;foreach ($movies as $movie) {if ($movie['cate_id'] === $cate['cate_id']) {$i++;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>";if ($i == 5) {echo '</ul><ul>';}}}echo '</ul></article>';}include __DIR__ . '/footer.php';
list.php
<?phpinclude __DIR__ . '/header.php';$cate_id = intval($_GET['cate_id']);foreach ($cates as $cate) {if ($cate_id === $cate['cate_id']) {echo "<article><h3>{$cate['alias']}</h3><ul>";$i = 0;foreach ($movies as $movie) {if ($movie['cate_id'] === $cate['cate_id']) {$i++;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>";if ($i == 5) {echo '</ul><ul>';}}}echo '</ul></article>';}}include __DIR__ . '/footer.php';
detail.php
<?phpinclude __DIR__ . '/header.php';$mov_id = intval($_GET['mov_id']);foreach ($movies as $movie) {if ($mov_id === $movie['mov_id']){echo "<h2>{$movie['name']}</h2>";echo '<div class="video">';echo '<video src="static/video/' . $movie['video'] . '" autoplay="autoplay" controls="controls" width="800"></video><ul>';echo '<li><span>导演：</span><a href="">' . $movie['direct'] . '</a></li>';echo '<li><span>编剧：</span><a href="">' . $movie['write'] . '</a></li>';echo '<li><span>主演：</span><a href="">' . $movie['star'] . '</a></li>';echo '<li><span>类型：' . $movie['type'] . '</span></li>';echo '<li><span>地区：' . $movie['area'] . '</span></li>';echo '<li><span>语言：' . $movie['language'] . '</span></li>';echo '<li><span>上映时间：' . $movie['date'] . '</span></li>';echo '<li><span>时长：' . $movie['length'] . '</span></li></ul></div><div class="detail">';echo "<h2>{$movie['name']}的剧情简介 · · · · · ·</h2><p>{$movie['detail']}</p></div>";}}include __DIR__ . '/footer.php';
六、总结
学会了php的判断和循环，还掌握了GET传值。
