php 之 数据访问 查询关键字 (0506)

根据数据库中的car表做一个汽车查询页面:

 一、一个关键字查询:

主页面:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<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>
<?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;
  }
?>

<br>
<form action="QiChe.php" method="post">
<div>
请输入查询内容:<input type="text" name="name" value="<?php echo $value; ?>"/> 
<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>

<?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>";
  }
?>

</table>
</body>
</html>

 封装类: 

<?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;
		}
	}	
}

  运行结果:

二、多个关键字查询:

主页面:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<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>
<?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
?>

<form action="ChaXun1.php" method="post">
<div>
请输入名称:<input type="text" name="name"  value="<?php echo $value; ?>"/>  
系列:<input type="text" name="brand" value="<?php echo $value1; ?>">
<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>

<?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>";
	}
?>
</table>

</body>
</html>

  运行结果:

原文地址:https://www.cnblogs.com/ds-3579/p/5465227.html