php使用select语句查询数据信息

Posted on 2018-12-14 19:20 勇敢的鑫阅读(3616) 评论(0) 编辑收藏举报

<html>
<head>
   <title>Finding User</title>
</head>
<body>
  <h2>Finding users from mysql database.</h2>
  <form action="selectformhandler.php" method="post">
     Select gender:
     <select name="gender">
       <option value="male">man</option>
       <option value="female">woman</option>
     </select><br />     
     <input name="submit" type="submit" value="Find"/>
  </form>
</body>
</html>

<html>
<head>
   <title>User found</title>
</head>
<body>
   <h2>User found from mysql database.</h2>
<?php
    $gender = $_POST['gender'];
    if(!$gender){
        echo "Error: There is no data passed.";
        exit;
    }
    if(!get_magic_quotes_gpc()){
        $gender = addslashes($gender);
    }
        @ $db = mysqli_connect('localhost','root','12345678');
        mysqli_select_db($db,'testphp');
        if(mysqli_connect_errno()){
         echo "Error: Could not connect to mysql database.";
         exit;
        }
        $q = "SELECT * FROM user WHERE gender = '".$gender."'";
        $result = mysqli_query($db,$q);
        $rownum = mysqli_num_rows($result);
        for($i=0; $i<$rownum; $i++){
           $row = mysqli_fetch_assoc($result);
           echo "Id:".$row['id']."<br />";
           echo "Name:".$row['name']."<br />";
           echo "Age:".$row['age']."<br />";
           echo "Gender:".$row['gender']."<br />";
           echo "Info:".$row['info']."<br />";
        }
        mysqli_free_result($result);
        mysqli_close($db);
?>
</body>
</html>