我正在学习......我已经阅读了http://www.w3schools.com上的教程，我查看了www.php.net上的手册，并对一切如何运作有了很好的理解。但是我对如何构建我的页面感到困惑。什么东西应该放在同一个页面上，什么应该有它自己的页面，只是被包含/需要？
我仍然需要阅读的一件事是参数化，所以不要打扰我......
这就是我所拥有的：
a.php这是用户在www.mydomain.com/a.php中输入时看到的页面
<html>
<body>
<?php require("b.php"); ?>
// this requires that the page gets b.php and puts it here
<p>Name: <?php echo $row['firstname']; ?></p>
<p>Last Name: <?php echo $row['lastname']; ?></p>
</body>
</html>
b.php此页面包含在a.php
中<?php
require("../dbunamepword.php");
// this connects to my database
$query = ("SELECT * FROM contacts WHERE contacttype IN ('Buyer','Seller','Buyer / Seller','Investor') AND leadstatus = 'New' ORDER BY date DESC");
$result = $mysqli->query($query) or die ("Error: ".mysqli_error($mysqli));
while ($row = $result->fetch_array()) {
// this fetches the data I want from the table in my db while all cases match above
$firstname = $row ['firstname'];
$lastname = $row['lastname'];
// these are the rows in the table I want to fetch
echo "First Name: " . $firstname . " " .$lastname ."<br />";
// this is how I want the data presented
}
?>
以下是我的问题提前感谢您：
1）使用函数如何使我在构建这些页面时受益，或者它们对我没有好处？
2）我不能忽略b.php上的echo，只需调用a.php中的行，如下所示，并输入foreach语句？我实际测试了这个并且我一直收到意外的$ end错误，所以我不确定这不是一个好方法或者我做错了什么？
<html>
<body>
<?php require("b.php"); ?>
// this requires that the page gets b.php and puts it here
<p>Name: <?php echo $firstname; ?></p>
<p>Last Name: <?php echo $lastname; ?></p>
</body>
</html>
3）假设我添加了一些if / else语句，如下所示，我应该将它们放在b.php中，还是将它们放在自己的文件c.php中，然后在b.php中添加一个include？
if(isset($_GET['leadstatus']) && $_GET['leadstatus'] == "All")
{
$query = "SELECT * FROM contacts WHERE contacttype IN ('Buyer','Seller','Buyer / Seller','Investor') ORDER BY contacts.date DESC";
}
elseif (in_array($_GET['leadstatus'], array('New', 'Hot', 'Warm', 'Cold', 'Rejected', 'Closed')))
{
$status = $_GET['leadstatus'];
$query = "SELECT * FROM contacts WHERE leadstatus = '".$status."' AND contacttype IN ('Buyer','Seller','Buyer / Seller','Investor') ORDER BY contacts.date DESC";
}
4）在$query我SELECT * FROM contacts WHERE contacttype IN ('Buyer','Seller','Buyer / Seller','Investor')而不是在每个if / else语句中输入，或者说我需要添加另一个字段，如'Renter'，我可以做类似的事吗：
$type = ('Buyer','Seller','Buyer / Seller','Investor')
$query = ("SELECT * FROM contacts WHERE contacttype = $type AND leadstatus = 'New' ORDER BY date DESC");
if (($_GET['date'] == 'today'))
{
$$query = "SELECT * FROM contacts WHERE contacttype = $type AND date = DATE(NOW()) ORDER BY date DESC";
}
if (($_GET['date'] == 'thisweek'))
{
$thisweek = date('Y-m-d', strtotime('last sunday'));
$query = "SELECT * FROM contacts WHERE contacttype = $type AND date BETWEEN '$thisweek' AND '$thisweek' + INTERVAL 7 DAY ORDER BY date DESC";
}