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Query keywords for php data access_php skills

WBOYOriginal: 2016-05-16 19:52:391469browse

The example in this article shares the implementation code of PHP query operation for your reference. The specific content is as follows

1. One keyword query

Main page:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>汽车查询页面</title>
</head>
 
<body>
<h1>汽车查询页面</h1>
<&#63;php
　　include("QiChe.class.php");
　　$db=new QiChe();
　　//保留输入查询的内容
　　$cx="";
　　$value="";
　　if(!empty($_POST["name"]))//判断查询内容是否为空
　　{
  $name=$_POST["name"];
  $cx=" where name like '%{$name}%'";//查询的字符串
  $value=$name;
　　}
&#63;>
 
<br>
<form action="QiChe.php" method="post">
<div>
请输入查询内容：<input type="text" name="name" value="<&#63;php echo $value; &#63;>"/> 
<input type="submit" value="查询"/>
</div>
</form>
<br />
 
<table width="100%" border="1" cellpadding="0" cellspacing="0">
<tr>
<td>代号</td>
<td>汽车名称</td>
<td>油耗</td>
<td>功率</td>
<td>价格</td>
</tr>
 
<&#63;php
　　$sql="select * from Car".$cx;
　　$attr=$db->query($sql);
　　foreach ($attr as $v)
　　{
  //使输入查询的关键字变色,处理name
  //$rp="<mark>{$value}</mark>";
  $rp="<span style='color:red'>{$value}</span>";
  $arr=str_replace($value,$rp,$v[1]);
   
  echo "<tr>
  <td>{$v[0]}</td>
  <td>{$arr}</td>
  <td>{$v[4]}</td>
  <td>{$v[5]}</td>
  <td>{$v[7]}</td>    
  </tr>";
　　}
&#63;>
 
</table>
</body>
</html>

Packaging class:

<&#63;php
class QiChe
{
  public $localhost="localhost";//服务器
  public $uid="root";//用户名
  public $password="";//密码
  //执行查询语句sql方法：
  //参数的含义：$sql代表要执行的sql语句；$type代表sql语句的类型，自义0为查询，1为其他（增删改查）；$db代表要查询的数据库
  public function Query($sql,$type="0",$db="mydb")
  {
    $dbconnect=new MySQLi($this->localhost,$this->uid,$this->password,$db);
    !mysqli_connect_error() or die("连接失败 ！");
    $result=$dbconnect->query($sql);
     
    if($type==0)
    {
      return $result->fetch_all();
    }
    else
    {
      return $result;
    }
  } 
}

Run result:

2. Multiple keyword query

Main page:

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>汽车查询页面</title>
</head>
 
<body>
<h1>汽车查询页面</h1>
<br>
<&#63;php
include ("./DBDA.class.php");
$db=new DBDA();
$cx="";
$value="";
$value1="";
$tj1=" 1=1";//条件1的判断name
$tj2=" 1=1";//条件2的判断brand
if(!empty($_POST["name"]))
{
  $name=$_POST["name"];
  $tj1="name like '%{$_POST['name']}%'"; 
  $value=$name;
   
}
if(!empty($_POST["brand"]))
{
  $name1=$_POST["brand"];
  $tj2="brand= '{$_POST['brand']}'"; 
  $value1=$name1;
}
$cx=" where $tj1 and $tj2";//查询字符串
&#63;>
 
<form action="ChaXun1.php" method="post">
<div>
请输入名称：<input type="text" name="name" value="<&#63;php echo $value; &#63;>"/> 
系列：<input type="text" name="brand" value="<&#63;php echo $value1; &#63;>">
<input type="submit" name="" value="查询">
 
</div>
</form>
<br>
 
<table width="100%" border="1" cellpadding="0" cellspacing="0">
<tr>
<td>代号</td>
<td>汽车名称</td>
<td>系列</td>
<td>价格</td>
<td>油耗</td>
<td>功率</td>
</tr>
 
<&#63;php
$sql="select * from Car".$cx;
$attr=$db->Query($sql);
foreach ($attr as $v)
{
   
  //处理name
  //$rp="<mark>{$value}</mark>";
  $rp="<span style='color:red'>{$value}</span>";
  $str=str_replace($value,$rp,$v[1]);
  echo "<tr>
  <td>{$v[0]}</td>
  <td>{$str}</td>
  <td>{$v[2]}</td>
  <td>{$v[7]}</td>
  <td>{$v[4]}</td>
  <td>{$v[5]}</td>  
  </tr>";
  }
&#63;>
</table>
 
</body>
</html>

Run result:

The above is the entire content of this article. I hope it will be helpful to everyone in learning PHP programming.

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