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
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<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>
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封装类:
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<?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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运行结果:
二、多个关键字查询
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<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>
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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。