PHP code reference for searching files and listing file names-PHP Tutorial-php.cn

PHP code reference for searching files and listing file names

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Release： 2016-07-25 08:58:00

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This article introduces an example code that searches for files in PHP and lists the searched file names for the reference of beginners.

Let’s first look at a simple PHP code to search files and display them.

As follows:

<?php
/**
* 搜索文件并列出文件名
* opendir打开目录
* readdir读取文件名
* unlink删除文件
* edit by bbs.it-home.org
*/
$dir = "file/class/";
//获取目录下的文件
if (is_dir($dir)) {
    if ($dh = opendir($dir)) {
        while (($file = readdir($dh)) !== false) {
        if($file!="."&&$file!=".."){
            $unexit[]=$file;}
        }
        closedir($dh);
    }
}
?>

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The following one is more powerful and more complex.

<?php
/**
* 文件: search.php
* 功能: 搜索指定目录下的HTML文件
*/

/* 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>.*<\/title>/i", $fileContent, $matchResult);
$title = preg_replace(array("/(<title>)/i","/(<\/title>)/i"), "", $matchResult[0]);
if (empty($title)) {
return $default;
} else {
return $title;
}
}
 
//获取文件描述信息
function getFileDescribe($file,$length=200, $default="None describe")
{
$metas = get_meta_tags($file);
if ($meta['description'] != "") {
return $metas['description'];
}
$fileContent = getFileContent($file);
preg_match("/(<body.*<\/body>)/is", $fileContent, $matchResult);
$pattern = array("/(<[^\x80-\xff]+>)/i","/(<input.*>)+/i", "/()+/i", "/(<img .* alt="PHP code reference for searching files and listing file names" >)+/i", 
"/([<script.*>])+.*([<\/script>])+/i","/&/i","/"/i","/&#039;/i", "/\s/");
$description = preg_replace($pattern, "", $matchResult[0]);
$description = mb_substr($description, 0, $length)." ...";
 
return $description;
}
 
//加亮搜索结果中的关键字
function highLightKeyword($text, $keyword, $color="#C60A00")
{
$newword = "<font color=$color>$keyword</font>";
$text = str_replace($keyword, $newword, $text);
return $text;
}
 
//获取文件大小(KB)
function getFileSize($file)
{
$filesize = intval(filesize($file)/1024)."K";
return $filesize;
}
 
//获取文件最后修改的时间
function getFileTime($file)
{
$filetime = date("Y-m-d", filemtime($file));
return $filetime;
}
 
//搜索目录下所有文件
function searchFile($dir, $keyword)
{
$sFile = getFile($dir);
if (count($sFile) <= 0) {
return false;
}
$sResult = array();
foreach ($sFile as $file) {
if (searchText($file, $keyword)) {
$sResult[] = $file;
}
}
if (count($sResult) <= 0) {
return false;
} else {
return $sResult;
}
} //by bbs.it-home.org
 
/* 测试代码 */
 
//指定要搜索的目录
$dir = "./php_Linux";
//要搜索的关键字
$keyword = "sendmail";
 
$fileArr = searchFile($dir, $keyword);
$searchSum = count($fileArr);
 
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>";
 
if ($searchSum <= 0) { 
echo "没有搜索到任何结果";
} else {
foreach ($fileArr as $file) {
echo "". highLightKeyword(getFileTitle($file), $keyword) .
   " - ".getFileSize($file)." ". getFileTime($file) .
   "<br>\n<font size=2>".highLightKeyword(getFileDescribe($file), $keyword) .
   "</font><br><br>";
}
}
?>

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