PHP站内搜索

2008/11/02 08:31 ..by mlzy

这里转载一个php的站内搜索源码，好处是不需要mysql。但是我感觉由于它只能搜索指定目录下的文件名，所以并不是很精确。

search.php文件

<?php
/****************************************************
原作者: uchinaboy
特点：无需mysql支持；速度快；无需设置路径，放在哪级目录下，就搜索该目录和子目录；可以
搜索一切文本类型的文件；显示文件相关内容；关键词自动高亮显示。
修改内容：增加了自动分页和风格设置文件。
搜索框代码（请单独存为html文件，如果放在search.php相同目录下，无需修改）：<form
method="post" action="search.php"><input type="text" name="key" size=40 value="">
<input type="submit" value="检索"></form>
****************************************************/
require ("search.inc");
if (function_exists("set_time_limit") && !get_cfg_var('safe_mode')){
set_time_limit(600);}
function get_msg($path) {
global $key, $i;
$handle = opendir($path);
while ($filename = readdir($handle)) {
//echo $path."/".$filename."<br>";
$newpath = $path."/".$filename;
if (is_file($newpath)) {
$fp = fopen($newpath, "r");
$msg = fread($fp, filesize($newpath));
fclose($fp);
match_show($key, $msg, $newpath, $filename);
}
if (is_dir($path."/".$filename) && ($filename != ".") &&  ($filename != "..")) {
//echo "<br><br>".$newpath."<br><br>";
get_msg($path."/".$filename);
}
}
closedir($handle);
return $i;
}

function match_show($key, $msg, $newpath, $filename) {
global $ar, $i;
$key = chop($key);
if($key) { $check_type = preg_match("/.html?$/", $filename);
if($check_type) {$title = getHtmlTitle($msg);}
   $msg = preg_replace("/<style>.+</style>/is", "", $msg);
   $msg = preg_replace("/<[^>]+>/", "", $msg);
   $value = preg_match("/.*$key.*/i", $msg, $res);
       if($value) {

$res[0] = preg_replace("/$key/i", "<FONT COLOR="red">$key</FONT>", $res[0]);
$k = $res[0];
$k = strrchr($k, "<FONT");
     $k = substr($k, 1, 100);
     $k = "<FONT COLOR="red">$key<$k";
     if($title) {$m = $title;} else {$m = $filename;}
     $i++;
     $link = $newpath;
     $ar[] = "$i.◆<a href="$link">$m</a><BR><BR>" .$k."<BR><br>";
   }
}else {
   echo "请输入关键词";
   exit;
}
}

function getHtmlTitle($msg) {

       /* Locate where <TITLE> is located in html file. */
       $lBound = strpos($msg, '<title>') + 7; //7 is the lengh of <TITLE>.

       if ($lBound < 1)
               return;

       /* Locate where </TITLE> is located in html file. */
       $uBound = strpos($msg, '</title>', $lBound);

       if ($uBound < $lBound)
               return;

       /* Clean HTML and PHP tags out of $title with the madness below. */
       $title = ereg_replace("[tnr]", '', substr($msg, $lBound, $uBound -
$lBound));
       $title = trim(strip_tags($title));

       if (strlen($title) < 1) //A blank title is worthless.
               return;

       return $title;
}

$i = get_msg(".");
if (empty($page)) $page=1;
$maxresult=($page*20);
$resultcount = count($ar);
if ($resultcount%20==0) $maxpageno=$resultcount/20;
       else $maxpageno=floor($resultcount/20)+1;
if ($page>$maxpageno) { $page=$maxpageno; $pagemax=$resultcount-1; $pagemin=max
(0,$result_count-20);}
       elseif ($page==1) {$pagemin=0; $pagemax=min($result_count-1,20-1); }
       else { $pagemin=min($resultcount-1,20*($page-1)); $pagemax=min($resultcount-
1,$pagemin+20-1); }
$maxresult=min($maxresult,$resultcount);
echo "<p align="center">";
echo "MLZY blog检索结果";
echo "</p><hr>";
for ($i=max(0,$maxresult-20); $i<$maxresult; $i++) {
print $ar[$i];
}
echo "<hr><p align="center">";
echo " 已经搜索到了 $resultcount 条信息";
     $nextpage=$page+1;
     $previouspage=$page-1;
echo " --- [ <a href='search.php?key=$key&page=$nextpage'  target='_self'>搜索下 20
个结果</a> ]";
echo " [ <a href='search.php?key=$key&page=$previouspage'  target='_self'>返回上 20
个结果</a> ]";
exit;

?>

search.inc文件

<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<STYLE type=text/css>BODY {
        font-family : 宋体;
        font-size : 10.5pt;
        font-weight : medium;
        background : #CCCCFF;
        position : absolute
}
P {
       FONT-SIZE: 10.5pt
}
TABLE {
       FONT-SIZE: 10.5pt
}
TD {
       FONT-SIZE: 10.5pt; LETTER-SPACING: 1pt; LINE-HEIGHT: 15pt
}
A:LINK {
        color : #000000;;TEXT-DECORATION: none

}
A:VISITED {
        color : #000000;;TEXT-DECORATION: none

}
A:HOVER {
        color : blue;TEXT-DECORATION: underline

}</style>
<title>全文检索</title>
<base target="_blank">
</head>

汇率实时转换——点击进入在线汇率换算工具