[转贴]搜索文本文件－－PHP站内搜索代码

wide288 · 发表于 2007-12-13 12:28:51

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）：

[php]
<form method="post" action="search.php">
<input type="text" name="key" size=40 value="">
<input type="submit" value="检索"></form>
****************************************************

search.php

<?php

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><BR>". $newpath."<BR><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("[\t\n\r]", '', 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 "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" c>
<meta name="GENERATOR" c>
<meta name="

rogId" c>
<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

INK {
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>
[/php]

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