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PHP directory recursive traversal program_PHP tutorial

WBOYOriginal: 2016-07-20 11:10:10732browse

A directory search program written by a friend can find the specified directory or file based on the directory name entered by the user. It also supports locking the directory. Friends in need can refer to it.

The code is as follows

Copy code

class Finder{
private $key ;
private $result;
private $previewLen = 50;
private $file_type = array('html','php','htm','txt');

function __construct($key){
$this->key = $key;
}

function find($folder){
$this->result = array();

if(is_array($folder)){
foreach($folder as $f){
$this->_find_in_folder($f);
}
}else {
$this->_find_in_folder($folder, true);
}

return $this->result;
}

function _find_in_folder($folder ,$bSub=false){
foreach(glob($folder.DIRECTORY_SEPARATOR.'*') as $f){
if (is_file($f)){
$extend =explode(". " , $f);
$type = strtolower(end($extend));
if(in_array($type,$this->file_type)){
$fd = file_get_contents($f );
$pos = strpos($fd,$this->key);
if($pos!==false){
$end = $pre = '...';
$pos -= floor($this->previewLen/2);
if($pos<0){
$pre = '';
$pos = 0;
}

$findata = substr($fd,$pos,$this->previewLen);
$findata = str_replace($this->key,''.$this->key.'',$findata);
$this->result[] = array('path'=>$f,'preview' =>$pre.$findata.$end);
}
}
continue;
}

if($bSub && is_dir($f)){
$this->_find_in_folder($f,true);
}
}
}

}

$cur_path = dirname(__FILE__);
if(isset($_GET['a'])){
$key = $_POST['key'];
if(!$key) die('Keyword cannot be empty');

$cf = new Finder($key);

$in_folder = array();
$limit_folder = $_POST['limit_folder'];
if($limit_folder== 1){
if(!isset($_POST['folder']) || !$_POST['folder']) die('Limited directory cannot be empty');
$in_folder = $_POST[ 'folder'];
$ret = $cf->find($in_folder);
}else{
$ret = $cf->find($cur_path);
}

echo "Search [$key] results:
";
if(!$ret) die('none');
foreach($ret as $p=> ;$f){
echo "$p. t$f[path] => $f[preview]
n";
}
exit();
}

$folder = array();
function readFolder($path){
global $folder;
$folder[] = $path;
foreach(glob($ path.DIRECTORY_SEPARATOR.'*') as $f){
if (is_dir($f)) {
readFolder($f);
}
}
}

readFolder($cur_path);
$folder_op = array();
foreach($folder as $path){
$folder_op[] = "

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