php数据访问之查询关键字，php数据关键字
php数据访问之查询关键字，php数据关键字
本文实例为大家分享了php查询操作的实现代码，供大家参考，具体内容如下
一、一个关键字查询
主页面：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>汽车查询页面</title>
</head>
<body>
<h1 id="汽车查询页面">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：
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>汽车查询页面</title>
</head>
<body>
<h1 id="汽车查询页面">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：
以上就是本文的全部内容，希望对大家学习php程序设计有所帮助。
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian
Dec 24, 2024 pm 04:42 PM
PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati
CakePHP Date and Time
Sep 10, 2024 pm 05:27 PM
To work with date and time in cakephp4, we are going to make use of the available FrozenTime class.
CakePHP File upload
Sep 10, 2024 pm 05:27 PM
To work on file upload we are going to use the form helper. Here, is an example for file upload.
CakePHP Routing
Sep 10, 2024 pm 05:25 PM
In this chapter, we are going to learn the following topics related to routing ?
Discuss CakePHP
Sep 10, 2024 pm 05:28 PM
CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu
CakePHP Creating Validators
Sep 10, 2024 pm 05:26 PM
Validator can be created by adding the following two lines in the controller.
How To Set Up Visual Studio Code (VS Code) for PHP Development
Dec 20, 2024 am 11:31 AM
Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c
CakePHP Logging
Sep 10, 2024 pm 05:26 PM
Logging in CakePHP is a very easy task. You just have to use one function. You can log errors, exceptions, user activities, action taken by users, for any background process like cronjob. Logging data in CakePHP is easy. The log() function is provide
