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PHP search engine based on text files

不言Original: 2018-04-14 17:03:472025browse

This article mainly introduces the PHP search engine based on text files, which has certain reference value. Now I share it with everyone. Friends in need can refer to it

PHP based on text files Search engine

<span style="color:#000000">The following is the text-based PHP search engine source code I found from zend.com and made some trivial Modification: <br>search.php <br><br></span>

<html>  
<head>  
<title>  
    搜索关键字是——<? "$keyyword" ?>  
</title>  
</head>  
<body bgcolor=yellow text=green>  
<form method=post action=search.php>  
<input type=text name=keyword>  
<br>  
<br>  
<input type=submit value=搜索>  
</form> 
<hr>  
<h2><b><u>Search results...</u></b></h2>  
<hr>  
<?  
if(!$keyword)  
    {  
    echo "请输入关键字!<br>";  
    exit;  
    }  
$fl="keywords.txt"; //保存搜索数据的文本文件 
$fp=fopen($fl, "r");  
if(!fp)  
    {  
    echo "无法读取数据文件！!";  
    }  
$fr=fread($fp, filesize($fl));  
$line=explode("/n", $fr);  
$id=0;  
for($i=0; $i<count($line); $i++)  
{  
    $lin=explode("|", $line[$i]);  
    if(eregi("$keyword", "$lin[0]"))  
        {  
        echo "<a href=$lin[1]>$lin[1]</a><br><spacer type=horizontal size=40>$lin[2]<br><br>";  
        }  
    else  
        {  
        $id++;  
        }  
}  
if($id==count($line))  
    {  
    echo "找不到匹配的结果!";  
    }  
?> 
</body> 
</html>

<span style="color:#000000">The format of the text file keywords containing search data is as follows: <br><br>Search engine | http://www.yahoo.com|Great search engine, you can find almost everything here. <br>movies|http://movies.yahoo.com|Popular movies, box office receipts, and upcoming new ones Movies. <br>Stocks|http://quote.yahoo.com|You can watch the stock market and foreign markets. <br>linux|http://www.linuxcentral.com|If you want to buy some Linux products, Why not come here. <br>linux|http://www.linux.org|Lots of applications, articles and more. <br>linux|http://www.linuxtoday.com|Linux news site, listing the latest LINUX news. <br>zdnet|http://www.zdnet.com|News and download station. <br>apache|http://www.apache.org|Popular website server. <br><br> <br>This code runs like this: <br><br>1. Open the text file containing the data. Keywords, URL, and introduction are all separated by |; <br>2. Assign the contents of this file to the variable $fr; <br>3. The value output by explode() is assigned to the $line variable; <br>4. Use explode() to repeatedly process the $line variable and assign the elements separated by | to the lin[] array; <br>5. Then compare the keyword with lin[0]; <br>6. If it matches, output - PHP will output lin[1], because this is a URL, so the cfba799dd43fce78ec3e9e3d200b7e485db79b134e9f6b82c0b36e0489ee08ed tag should be added; <br>7. Another very cool variable is $id. If the keyword does not match lin[0], it will be equal to &line with $id, and then it will tell you that it cannot be found:) <br><br>In oso me I also saw another similar piece of code, the implementation methods are similar. <br></span>

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