[英]Integrating PHP functions with a database
I just submitted my work and my course leader has asked me to use PHP functions to query my database. 我刚刚提交了我的工作,而课程负责人要求我使用PHP函数来查询数据库。 How can I do this?
我怎样才能做到这一点? Is it possible to add just "function getRooms" before my queries, and return the desired result.
是否可以在查询之前仅添加“ function getRooms”,并返回所需结果。 I need thorough briefing on functions with MySQL .
我需要有关MySQL函数的详尽介绍。
For example: How will I add a function to this code: 例如:如何将函数添加到此代码中:
<?php
// By Kelvin
include ("player.php");
$result = mysql_query("SELECT * FROM phplogin WHERE username = '$username'");
$row = mysql_fetch_assoc($result);
$medipack = $row['medipack'];
if ($_POST['object'] == "Use Medipack") {
if ($medipack != 0) {
mysql_query("UPDATE phplogin SET score = score + 50, health = health + 50, medipack = medipack - 1
WHERE username = '$username'");
echo ("<P>Medipack Used!</P>");
$RoomNumber =5;
}
else {
echo ("<P>You're all out of medipacks!</P>");
}
}
?>
If he's looking for a level of abstraction between the rest of your code and the code accessing the database, wrapping the database logic in functions should be on the right path: 如果他正在寻找其余代码与访问数据库的代码之间的抽象层次,那么将数据库逻辑包装在函数中应该在正确的路径上:
function getRooms($link){
$sql = "SELECT * FROM rooms";
$data = array();
if($set = mysql_query($sql)){
while($row = mysql_fetch_assoc($set)){
$data[] = $row;
}
}
return empty($data)
? null
: $data;
}
$db_connection = mysql_connect('host', 'user', 'pass');
mysql_select_db('name', $db_connection);
$rooms = getRooms($db_connection);
Wrapping these functions into a class, and accessing them by methods is another step, as the instantiated object can manage its own connection, etc., but that may be a step further than necessary. 将这些函数包装到一个类中,并通过方法访问它们是另一个步骤,因为实例化的对象可以管理其自己的连接等,但这可能比必要的步骤要远。 Other functions (based on what I can guess) might be:
其他功能(根据我的猜测)可能是:
function getRoomById($link, $id){ }
function getRoomsByName($link, Array $names){ }
我想您的课程负责人是指PHP的本机MySQL函数-http://php.net/manual/zh/book.mysql.php
You can wrap your queries inside PHP functions. 您可以将查询包装在PHP函数中。 For example, like this:
例如,像这样:
function &getRooms(){
$query="SELECT id,name FROM rooms";
$result=mysql_query($query);
$ar_out=array();
while ($row = mysql_fetch_assoc($result)) {
$ar_out[]=$row;
}
return $ar_out;
}
This said, you really should find a tutorial or a book on how to use MySQL and PHP together. 也就是说,您确实应该找到有关如何一起使用MySQL和PHP的教程或书籍。 There are many things to know about code organization and performance.
关于代码的组织和性能,有很多事情要知道。
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