自己写来简单的搜索自己电脑上的技术资料的. 大概的思路就是寻找指定目录下的文本, 然后如果有与关键字相匹配的数据就把文件名返回, 最后把所有搜索结果显示出来. 显示结果类似于baidu/google, 呵呵, 这个是纯粹为了好玩.
程序代码:
/**
* 文件: search.php
* 功能: 搜索指定目录下的HTML文件
* 创建: 2005-9-23
* 作者: heiyeluren
*/
/* 基本函数 */
//获取目录下文件函数
function getFile($dir)
{
$dp = opendir($dir);
$fileArr = array();
while (!false == $curFile = readdir($dp)) {
if ($curFile!="." && $curFile!=".." && $curFile!="") {
if (is_dir($curFile)) {
$fileArr = getFile($dir."/".$curFile);
} else {
$fileArr[] = $dir."/".$curFile;
}
}
}
return $fileArr;
}
//获取文件内容
function getFileContent($file)
{
if (!$fp = fopen($file, "r")) {
die("Cannot open file $file");
}
while ($text = fread($fp, 4096)) {
$fileContent .= $text;
}
return $fileContent;
}
//搜索指定文件
function searchText($file, $keyword)
{
$text = getFileContent($file);
if (preg_match("/$keyword/i", $text)) {
return true;
}
return false;
}
//搜索出文章的标题
function getFileTitle($file, $default="None subject")
{
$fileContent = getFileContent($file);
$sResult = preg_match("/.*<\/title>/i", $fileContent, $matchResult);<br> $title = preg_replace(array("/(<title>)/i","/(<\/title>)/i"), "", $matchResult[0]);<br> if (empty($title)) {<br> return $default;<br> } else {<br> return $title;<br> }<br>}<br>//获取文件描述信息<br>function getFileDescribe($file,$length=200, $default="None describe")<br>{<br> $metas = get_meta_tags($file);<br> if ($meta['description'] != "") {<br> return $metas['description'];<br> }<br> $fileContent = getFileContent($file);<br> preg_match("/(<body.*<\/body>)/is", $fileContent, $matchResult);<br> $pattern = array("/(<[^\x80-\xff]+>)/i","/(<input.*>)+/i", "/(<a.*>)+/i", "/(<img.*>)+/i", "/([<script.*>])+.*([<\/script>])+/i","/&/i","/"/i","/'/i", "/\s/");<br> $description = preg_replace($pattern, "", $matchResult[0]);<br> $description = mb_substr($description, 0, $length)." ...";<br> return $description;<br>}<br>//加亮搜索结果中的关键字<br>function highLightKeyword($text, $keyword, $color="#C60A00")<br>{<br> $newword = "<font color=$color>$keyword</font>";<br> $text = str_replace($keyword, $newword, $text);<br> return $text;<br>}<br>//获取文件大小(KB)<br>function getFileSize($file)<br>{<br> $filesize = intval(filesize($file)/1024)."K";<br> return $filesize;<br>}<br>//获取文件最后修改的时间<br>function getFileTime($file)<br>{<br> $filetime = date("Y-m-d", filemtime($file));<br> return $filetime;<br>}<br>//搜索目录下所有文件<br>function searchFile($dir, $keyword)<br>{<br> $sFile = getFile($dir);<br> if (count($sFile) <= 0) {<br> return false;<br> }<br> $sResult = array();<br> foreach ($sFile as $file) {<br> if (searchText($file, $keyword)) {<br> $sResult[] = $file;<br> }<br> }<br> if (count($sResult) <= 0) {<br> return false;<br> } else {<br> return $sResult;<br> }<br>}<br><br>/* 测试代码 */<br>//指定要搜索的目录<br>$dir = "./php_Linux";<br>//要搜索的关键字<br>$keyword = "sendmail";<br>$fileArr = searchFile($dir, $keyword);<br>$searchSum = count($fileArr);<br>echo "搜索关键字: <b>$keyword</b> 搜索目录: <b>$dir</b> 搜索结果: <b>$searchSum</b><br><hr size=1><br>";<br>if ($searchSum <= 0) { <br> echo "没有搜索到任何结果";<br>} else {<br> foreach ($fileArr as $file) {<br> echo "<a href='$file' target='_blank'>". highLightKeyword(getFileTitle($file), $keyword) .<br> "</a> - ".getFileSize($file)." ". getFileTime($file) .<br> "<br>\n<font size=2>".highLightKeyword(getFileDescribe($file), $keyword) .<br> "</font><br><br>";<br> }<br>}<br>?><br> 完全可以用在自己已经生成静态内容的的搜索, 但是程序效率不高. 如果能够适当的加上 索引/缓存 等机制的话, 我想程序会有趣很多. <br></td></tr></table>
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