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Correction status：qualified
Teacher's comments：写得不错
Collection
Collection
-第1種是 foreach($arr as $k =>$v){
echo $k.$v;
}; ----------->當中$k為鍵名,$v為鍵值
-第2種為 foreach($arr as $v):
echo $v;
endforeach; ----------->當中$v直接為鍵值。
<?php
// store data
$headline = 'Movie Today';
$movies = [ 'Strange Things', 'Avengers', 'Star Wars' ];
?>
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title><?php echo $headline; ?></title>
</head>
<body>
<h2><?php echo $headline; ?></h2>
<p>using {} to do a foreach </p>
<ul>
<?php foreach ( $movies as $k => $v ) { ?>
<li><a href="#"><?php echo $v ?></a></li>
<?php } ?>
</ul>
<p>using : to do a foreach</p>
<ul>
<?php foreach ( $movies as $v ): ?>
<li><a href="#"><?php echo $v ?></a></li>
<?php endforeach; ?>
</ul>
<p>------------------------------------------------</p>
<form action="" method="post">
<label for="email">Email:</label>
<input type="email" id="email" name="email" value="<?php echo isset( $_POST['email'] ) ? $_POST['email'] : ''; ?>">
<label for="password">Password:</label>
<input type="password" id="password" name="password" value="">
<button>Login</button>
</form>
<?php echo '<pre>'; ?>
<?php print_r( $_POST ); ?>
</body>
</html>点击 "运行实例" 按钮查看在线实例