php数据访问之查询关键字
本文根据数据库中的car表做一个汽车查询页面,巩固php查询关键字操作,感兴趣的小伙伴们可以参考一下
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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<?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
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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 > |
运行结果: