![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
PHPzCorrection status：qualified
Teacher's comments：
Collection
Collection
4种标量类型 整型 字符串 布尔型 浮点型
2种复合型 数组 对象
2种特殊类型 resource null
整型 $int = 32;
字符串 定义在单引号、双引号、定界符中 $password = "qnfjklg123";
布尔型 $boolean = true;
浮点型$float = 12.12;
数组$user = ['id' => 1, 'name' => '李四', 'email' => '123456789@qq.com'];
resource
$handle = fopen('log.log','w')var_dump($handle);
null$avatar = null;
<!DOCTYPE html><html lang="zh-CN"><head><meta charset="UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title><? echo "数组遍历" ?></title></head><body><?php/*** foreach($arr as $k=>$v)* {* each $v['name'];* }*/$navs = [['id' => 1, 'name' => '前端相关'],['id' => 2, 'name' => '后端相关'],['id' => 3, 'name' => '微信相关'],['id' => 4, 'name' => '辅助学习'],['id' => 5, 'name' => 'phppadmin管理系统'],];?></body><div><ul><?php foreach ($navs as $k => $v) { ?><li><?= $v['name'] ?></li><?php } ?></ul><ul><?php foreach ($navs as $k => $v) : ?><li><?= $v['name'] ?></li><? endforeach ?></ul><ul><?phpforeach ($navs as $v) {echo "<li>{$v['name']}</li>";}?></ul></div></html><!-- php模板语法 为了省略流程控制中或者循环遍历中的{}对齐问题 --><!-- foreach...endforeach if...endif switch...endswitch while...endwhile -->
<!DOCTYPE html><html lang="zh-CN"><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>购物车</title></head><body><?php$arr = [['name' => '苹果', 'num' => 1, 'price' => 5],['name' => '柚子', 'num' => 1, 'price' => 10]];?><div><table border="1" cellspacing="0"><thead><tr><th>品名</th><th>数量</th><th>价格</th></tr></thead><tbody><?php foreach ($arr as $key =>$value) { ?><tr><td><?= $value['name'] ?></td><td><?= $value['num'] ?></td><td><?= $value['price'] ?></td></tr><?php } ?></tbody><tfoot></tfoot></table></div></body></html>