Query keywords for php data access_php skills
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>
<?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>Packaging class:
<?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>
<?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>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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