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How to implement PHP search function?

Guanhui

Jul 22, 2020 pm 01:22 PM

php

How to implement PHP search function?

How to implement PHP search function?

First add an input box and a button on the front end; then receive the content of the front-end input box on the back end; then perform a fuzzy query based on the received content; and finally render the fuzzy query data or Just return it to the front end.

Sample code

<?php require_once(&#39;&#39;Connections/conn.php&#39;&#39;); ?>
<?php
$colname_rs = $_GET[&#39;&#39;key&#39;&#39;]; //获得用户输入
$result = explode(&#39;&#39;,&#39;&#39;,$_GET[&#39;&#39;key&#39;&#39;]);//分解用户输入的多个关键词，存入$result数组
mysql_select_db($database_conn, $conn); //连接数据库
//根据多个关键词构建SQL语句
$query_rs = "SELECT * FROM (";
for($i=0;$i<count($result);$i++) //根据每个搜索关键词构建SQL语句
{
if($i==0) //对第一个关键词，不使用UNION
$query_rs .= "SELECT * FROM searchtable WHERE title LIKE &#39;&#39;%$result[0]%&#39;&#39;
OR content LIKE &#39;&#39;%$result[0]%&#39;&#39;";
else //对其他关键词，使用UNION连接
$query_rs .= " UNION SELECT * FROM searchtable WHERE title LIKE
&#39;&#39;%$result[$i]%&#39;&#39; OR content LIKE &#39;&#39;%$result[$i]%&#39;&#39;";
}
$query_rs .= ") T ORDER BY last_access DESC"; //对搜索结果排序
//执行SQL语句
$rs = mysql_query($query_rs, $conn) or die(mysql_error());
$row_rs = mysql_fetch_assoc($rs);
$totalRows_rs = mysql_num_rows($rs);
?>
<html>
<head>
<title>Search</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<form name="form1" method="get" action="?">
<div align="center">请输入要搜索关键词：
<input name="key" type="text" size="64" value="<?php echo $_GET[&#39;&#39;key&#39;&#39;] ?>">
<input type="submit" value="Submit">
</div>
</form>
<p align="center"><B>当前关键词：
<?php
for($i=0;$i<count($result);$i++) { //循环显示关键词
echo $result[$i]." ";
}
?></B></p>
<p><hr></p>
<?php if($totalRows_rs>0) do { //显示当前搜索结果 ?>
<p>* <a href="show.php?key=<?php echo $colname_rs ?>&id=<?php echo
$row_rs[&#39;&#39;id&#39;&#39;]; ?>"><?php echo $row_rs[&#39;&#39;title&#39;&#39;]; ?></a>(<?php echo
$row_rs[&#39;&#39;click&#39;&#39;]; ?> | <?php echo $row_rs[&#39;&#39;last_access&#39;&#39;]; ?>)</p>
<?php } while ($row_rs = mysql_fetch_assoc($rs)); ?>
</body>
</html>
<?php
mysql_free_result($rs);
?>