PHP data access query keywords, PHP data keywords_PHP tutorial-PHP Tutorial-php.cn

PHP data access query keywords, PHP data keywords_PHP tutorial

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Release： 2016-07-12 08:52:47

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Query keywords for php data access, php data keywords

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>

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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;
    }
  } 
}

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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>

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Run result:

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