zip.class.php

这是matlab的一个小程序

<?php
class zip
{
	var $datasec, $ctrl_dir = array();
	var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
	var $old_offset = 0; var $dirs = Array(".");

	function get_List($zip_name)
	{
		$ret = '';
		$zip = @fopen($zip_name, 'rb');
		if(!$zip)
		{
			return(0);
		}
		$centd = $this->ReadCentralDir($zip,$zip_name);
		@rewind($zip);
		@fseek($zip, $centd['offset']);
		for ($i=0; $i<$centd['entries']; $i++)
		{
			$header = $this->ReadCentralFileHeaders($zip);
			$header['index'] = $i;$info['filename'] = $header['filename'];
			$info['stored_filename'] = $header['stored_filename'];
			$info['size'] = $header['size'];$info['compressed_size']=$header['compressed_size'];
			$info['crc'] = strtoupper(dechex( $header['crc'] ));
			$info['mtime'] = $header['mtime']; $info['comment'] = $header['comment'];
			$info['folder'] = ($header['external']==0x41FF0010||$header['external']==16)?1:0;
			$info['index'] = $header['index'];$info['status'] = $header['status'];
			$ret[]=$info; unset($header);
		}
		return $ret;
	}

	function Add($files,$compact)
	{
		if(!is_array($files[0]))
		{
			$files=Array($files);
		}
		for($i=0;$files[$i];$i++)
		{
			$fn = $files[$i];
			if(!in_Array(dirname($fn[0]),$this->dirs))
			{
				$this->add_Dir(dirname($fn[0]));
			}
			if(basename($fn[0]))
			{
				$ret[basename($fn[0])]=$this->add_File($fn[1],$fn[0],$compact);
			}
		}
		return $ret;
	}

	function get_file()
	{
		$data = implode('', $this -> datasec);
		$ctrldir = implode('', $this -> ctrl_dir);
		return $data . $ctrldir . $this -> eof_ctrl_dir .
		pack('v', sizeof($this -> ctrl_dir)).pack('v', sizeof($this -> ctrl_dir)).
		pack('V', strlen($ctrldir)) . pack('V', strlen($data)) . "\x00\x00";
	}

	function add_dir($name)
	{
		$name = str_replace("\\", "/", $name);
		$fr = "\x50\x4b\x03\x04\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
		$fr .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
		$fr .= pack("v", 0 ).$name.pack("V", 0).pack("V", 0).pack("V", 0);
		$this -> datasec[] = $fr;
		$new_offset = strlen(implode("", $this->datasec));
		$cdrec = "\x50\x4b\x01\x02\x00\x00\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00";
		$cdrec .= pack("V",0).pack("V",0).pack("V",0).pack("v", strlen($name) );
		$cdrec .= pack("v", 0 ).pack("v", 0 ).pack("v", 0 ).pack("v", 0 );
		$ext = "\xff\xff\xff\xff";
		$cdrec .= pack("V", 16 ).pack("V", $this -> old_offset ).$name;
		$this -> ctrl_dir[] = $cdrec;
		$this -> old_offset = $new_offset;
		$this -> dirs[] = $name;
	}

	//缂栬瘧鎸囧畾鐨勬枃浠朵负zip鏂囦欢锛坒ilename鍙