本文实例为大家分享了php实现查询功能的具体代码,供大家参考,具体内容如下
输入关键字效果
代码:
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<body>
<h1>汽车信息</h1>
<?php
require "dbda.class1.php" ; //$type 代表sql语句的类型,0代表增删改,1代表查询
$db = new dbda();
//如果没有提交数据,显示所有
//如果有提交数据,根据关键字查询显示
$name = "" ;
$tj1 = " 1=1 " ; //第一个条件,对应名称,注意空格
$tj2 = " 1=1 " ; //第二个条件,对应系列,注意空格
if (! empty ( $_post [ "name" ]))
{
$name = $_post [ "name" ];
$tj1 = " name like '%{$name}%'" ;
}
if (! empty ( $_post [ "brand" ]))
{
$brand = $_post [ "brand" ];
$tj2 = " brand like '%{$brand}%'" ;
}
//总条件
$tj = "{$tj1} and {$tj2}" ;
$sql = "select * from car where " . $tj ; //注意where后空格
/*echo $sql;*/
?>
<form action= "chaxun.php" method= "post" >
<div>名称:<input type= "text" name= "name" value= "<?php echo $name ?>" />系列:<input type= "text" name= "brand" /><input type= "submit" value= "查询" /></div>
</form>
<br/>
<table width= "100%" border= "1" cellpadding= "0" cellspacing= "0" >
<tr>
<td>代号</td>
<td>名称</td>
<td>系列</td>
<td>上市时间</td>
<td>价格</td>
</tr>
<?php
//只适用于单条件查询
/*$sql = "select * from car";
$name="";
if(!empty($_post["name"]))
{
$name = $_post["name"];
$sql = "select * from car where name like '%{$name}%' ";
}*/
$arr = $db ->query( $sql );
foreach ( $arr as $v )
{
$str = str_replace ( $name , "<span style='color:red'>{$name}</span>" , $v [1]);
echo "<tr>
<td>{ $v [0]}</td>
<td>{ $str }</td>
<td>{ $v [2]}</td>
<td>{ $v [3]}</td>
<td>{ $v [7]}</td>
</tr>";
}
?>
</table>
</body>
</html>
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所引用的封装类
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<?php
class dbda
{
public $host = "localhost" ;
public $uid = "root" ;
public $pwd = "123" ;
public $dbname = "newssystem" ;
//执行sql语句返回相应的结果
//$sql 要执行的sql语句
//$type 代表sql语句的类型,0代表增删改,1代表查询
function query( $sql , $type =1)
{
$db = new mysqli( $this ->host, $this ->uid, $this ->pwd, $this ->dbname);
$result = $db ->query( $sql );
if ( $type )
{
//如果是查询,显示数据
return $result ->fetch_all();
}
else
{
//如果是增删改,返回true或者false
return $result ;
}
}
}
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以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。