php參數傳遞及數據庫連接方法

PHP參數傳遞 POST和GET傳遞；

GET獲取URL參數如：http://www.xxx.com/do.php?search=aaa&do=bbb;

$search=$_GET['search']; 注意GET大寫

POST獲取form表單傳遞過來 如：

<form method=”post” action=”search.php” name=”search”>
<input name=”search” type=”text” value=”" size=”15″> <input type=”submit” value=”Search”>
</form>

這段代碼是建立一個FORM表單.專門用來提交數據的.

search.php 獲取 $searchs = $_POST['search']; 注意POST大寫

數據庫連接常用方法如下：

//連接數據庫方式1

$conn = new mysqli('localhost', 'root', 'password', 'test');

//連接數據庫方式2

// $conn = new mysqli();

// $conn -> connect('localhost', 'root', 'password', 'test');

//check connection (檢查PHP是否連接上MYSQL)

if ($conn -> connect_errno) {

    printf("Connect failed: %s\n", $conn->connect_error);

    exit();

}

//查詢代碼

$sql = “select * from db_table”;

$query = $conn->query($sql);

while($row = $query->fetch_array()){

    echo $row['title'];

}

//查詢代碼

//釋放結果集+關閉MySQL連接

$query1 -> free_result();

$conn -> close();