php单一关键字查询
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 tdansitional//EN" "http://www.w3.org/td/xhtml1/DTD/xhtml1-tdansitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<h1>查询页面</h1>
<?php
$db = new MySQLi("localhost","root","","12345");
$tj = " 1=1 "; //条件默认恒成立
$name = "";
if(!empty($_POST["name"]))
{
$name = $_POST["name"];
$tj = " name like '%{$name}%' ";
}
?>
<form action="test.php" method="post">
<div>请输入名称：
<input type="text" name="name" />
<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>时间</td>
<td>油耗</td>
<td>功率</td>
</tr>
<?php
$sql = "select * from car where {$tj}";
echo $sql;
$result = $db->query($sql);
$attr = $result->fetch_all();
foreach($attr as $v)
{
$str = str_replace($name,"<mark>{$name}</mark>",$v[1]);
echo "<tr>
<td>{$v[0]}</td>
<td>{$str}</td>
<td>{$v[2]}</td>
<td>{$v[3]}</td>
<td>{$v[4]}</td>
<td>{$v[5]}</td>
</tr>";
}
?>
</table>
</body>
</html>
结果：
关键字查找“325”：
多条件查询
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 tdansitional//EN" "http://www.w3.org/td/xhtml1/DTD/xhtml1-tdansitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>无标题文档</title>
</head>
<body>
<h1>查询页面</h1>
<?php
$db = new MySQLi("localhost","root","","12345");
$tj1 = " 1=1 ";
$tj2 = " 1=1 ";
$name = "";
if(!empty($_POST["name"]))
{
$name = $_POST["name"];
$tj1 = " name like '%{$name}%' ";
}
if(!empty($_POST["brand"]))
{
$brand = $_POST["brand"];
$tj2 = " brand = '{$brand}' ";
}
?>
<form action="main.php" method="post">
<div>请输入名称：
<input type="text" name="name" value="<?php echo $name ?>" />
请输入系列代号：
<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>时间</td>
<td>油耗</td>
<td>功率</td>
</tr>
<?php
$sql = "select * from car where {$tj1} and {$tj2}";
echo $sql;
$result = $db->query($sql);
$attr = $result->fetch_all();
if(count($attr)>0)
{
foreach($attr as $v)
{
$str = str_replace($name,"<mark>{$name}</mark>",$v[1]);
echo "<tr>
<td>{$v[0]}</td>
<td>{$str}</td>
<td>{$v[2]}</td>
<td>{$v[3]}</td>
<td>{$v[4]}</td>
<td>{$v[5]}</td>
</tr>";
}
}
else
{
echo "<script>alert('没有查到数据');</script>";
}
?>
</table>
</body>
</html>
结果：
查询关键字“奥迪”，代号为“b002”的结果：
