Adodbzip class instance in php, phpadodbzip class instance_PHP tutorial

/**
* AdodbZip 1.1
*
* Code example:
* include_once 'AdodbZip.php';
* $db = AdodbZip::init(NewADOConnection('mysql tutorialt'));
* echo $db->GetOne('SELECT NOW()');
*
* Process description:
* 1. If the Adodb program file in $extract_dir exists and $zip_file does not exist; use the Adodb program file in $extract_dir.
* 2. If the Adodb program file in $extract_dir exists, and $zip_file exists; compare the modification time, and the Adodb program file in $extract_dir is updated to the newer one.
* 3. If the Adodb program file in $extract_dir does not exist and $zip_file exists; then the Adodb program file in $extract_dir is decompressed from $zip_file.
* 4. If the Adodb program file in $extract_dir does not exist and $zip_file does not exist; download the Adodb Zip file from $zip_url and decompress the Adodb program file.
*Other instructions:
* 1. $extract_dir can be customized. If you completely extract the Adodb Zip package to this directory, you can ignore the $zip_url and $zip_file settings, which is the same as using Adodb traditionally.
* 2. $zip_file can be customized. If $zip_file exists, $zip_url can be ignored, so that $zip_file can be used uniformly throughout the site.
* 3. $zip_url can be customized. The Adobe version can be modified at any time. At this time, it is best to use the default values ​​​​for $zip_file and $extract_dir, so that the versions do not interfere with each other.
* 4. $server, $user, $pwd, $db can be customized. The default is the mysql default value. This item only takes effect after calling the AdodbZip::init method.
* 5. $charset can be customized. By default, the encoding is not changed. This item only takes effect after calling the AdodbZip::init method.
* 6. Adodb initialization value can be added in AdodbZip::init method.
​*/

/**
* AdodbZip startup item
​*/
// Set parameters
AdodbZip::$zip_url = 'http://c.net tutorial works-kr-1.dl.sourceforge.net/project/adodb/adodb-php5-only/adodb-509-for-php5/adodb509.zip'; //[Setting Item] Adobe’s Zip file download address. If the file is large, it is recommended to download or decompress it first
AdodbZip::$zip_file = sys_get_temp_dir () . preg_replace ( '/^.*/(adodb.*?.zip)$/i', 'adodb/$1', AdodbZip::$zip_url ); //[Setting item] Adodb’s Zip file cache location
AdodbZip::$entry_dir = 'adodb5';
AdodbZip::$extract_dir = sys_get_temp_dir () . 'adodb/' . AdodbZip::$entry_dir; //[Setting item] Adodb program file cache location
AdodbZip::$server = 'localhost'; //[Setting item] Server
AdodbZip::$user = 'root'; //[Setting item] Username
AdodbZip::$pwd = ''; //[Setting Item] Password
AdodbZip::$db = 'test'; //[Setting Item] Database Tutorial
AdodbZip::$charset = ''; //[Setting item] encoding

// Registration Agreement
if (! in_array ( 'AdodbZip', stream_get_wrappers () )) {
stream_wrapper_register ( 'AdodbZip', 'AdodbZip' );
}
// Define constants
if (! defined ( 'ADODB_DIR' )) {
define ( 'ADODB_DIR', 'AdodbZip:/' );
}
// Contains program
require_once (ADODB_DIR . '/adodb.inc.php');
// $db = AdodbZip::init(NewADOConnection('mysqlt')); // [Selected Item] Reference is defined $db
// return AdodbZip::init(NewADOConnection('mysqlt')); // [Selection] reference will return $db. Note that it can only be referenced once.

/**
* AdodbZip class definition
​*/
class AdodbZip {

/**
* Adodb variable
​*/
public static $zip_url;
public static $zip_file;
public static $entry_dir;
public static $extract_dir;
public static $server;
public static $user;
public static $pwd;
public static $db;
public static $charset;

/**
* Stream variable
​*/
private $handle;
public $context;

/**
* Adodb function group
​*/

/**
  * init
  * @param adodb &$adodb
  * @return adodb
 */
public static function init(&$adodb) {
$adodb->Connect ( self::$server, self::$user, self::$pwd, self::$db );
if(self::$charset!=''){
$adodb->Execute('SET NAMES '.self::$charset.';');
}
Return $adodb;
}

/**
* Stream function group
​*/

/**
  * __construct
 */
public function __construct() {
}

/**
  * stream_cast
  * @param int $cast_as
  * @return resource
 */
 public function stream_cast($cast_as) {
  return false;
 }
 
 /**
  * stream_close
 */
 public function stream_close() {
  fclose ( $this->handle );
 }
 
 /**
  * stream_eof
  * @return bool
 */
 public function stream_eof() {
  return feof ( $this->handle );
 }
 
 /**
  * stream_flush
  * @return bool
 */
 public function stream_flush() {
  return fflush ( $this->handle );
 }
 
 /**
  * stream_lock
  * @param mode $options
  * @return bool
 */
 public function stream_lock($options) {
  return flock ( $this->handle, $options );
 }
 
 /**
  * stream_open
  * @param string $path
  * @param string $mode
  * @param int $options
  * @param string &$opend_path
  * @return bool
 */
 public function stream_open($path, $mode, $options, &$opend_path) {
  // 验证文件地址
  if (! preg_match ( '/^.*?://(.*)$/', $path, $matches )) {
   return false;
  }
  $tmp_file = self::$extract_dir . DIRECTORY_SEPARATOR . $matches [1];
  $entry_file = self::$entry_dir . '/' . str_replace ( '', '/', $matches [1] );
  $zip_file = self::$zip_file;
  // 验证程序文件
  if (! file_exists ( $tmp_file ) || file_exists ( $zip_file ) && filectime ( $tmp_file ) < filectime ( $zip_file )) {
   // 下载文件
   if (! file_exists ( $zip_file )) {
    // 目录处理
    if (! is_dir ( dirname ( self::$zip_file ) )) {
     if (mkdir ( dirname ( self::$zip_file ), 0777, true ) === false) {
      header ( 'Content-type: text/html;charset=utf-8' );
      die ( '请创建目录 ' . $zip_dir );
     }
    }
    // 下载文件
    if (! file_exists ( self::$zip_file )) {
     $break = true;
     do {
      $url_arr = parse_url ( self::$zip_url );
      $fp = fsockopen ( $url_arr ['host'], isset ( $url_arr ['port'] ) ? ( int ) $url_arr ['port'] : 80, $errno, $errstr, 10 );
      if ($fp === false) {
       break;
      }
      $out = "GET " . $url_arr ['path'] . " HTTP/1.0rnHost: " . $url_arr ['host'] . " rnConnection: closernrn";
      fputs ( $fp, $out );
      if (feof ( $fp )) {
       break;
      }
      $buffer = fgets ( $fp, 1024 );
      if (! preg_match ( '/^HTTP/1.d 200 /i', $buffer )) {
       break;
      }
      $content_length = false;
      $content_start = false;
      while ( ! feof ( $fp ) ) {
       $buffer = fgets ( $fp, 1024 );
       if ($buffer === "rn") {
        $content_start = true;
        break;
       }
       if (preg_match ( '/^Content-Length:s*(d+)/i', $buffer, $matches )) {
        $content_length = ( int ) $matches [1];
       }
      }
      if ($content_length === false || $content_start === false) {
       break;
      }
      $content = stream_get_contents ( $fp );
      if ($content === false) {
       break;
      }
      $result = file_put_contents ( self::$zip_file, $content );
      unset ( $content );
If ($result === false) {
        break;
        }
        fclose ( $fp );
} while ( $break = false );
If ($break) {
header ( 'Content-type: text/html;charset=utf-8' );
die ( 'Please download the file' . self::$zip_url . '.zip Save as' . self::$zip_file ) ;
}  
}
}
//Create directory
$tmp_dir = dirname ( $tmp_file );
if (! is_dir ( $tmp_dir )) {
If (mkdir ( $tmp_dir, 0777, true ) === false) {
header ( 'Content-type: text/html;charset=utf-8' );
         die ( 'Please create directory ' . $tmp_dir );
}
}
// Open the compressed file
$zip = zip_open ( $zip_file );
if (! is_resource ( $zip )) {
Return false;
}
// Find the unzipped file
do {
$entry = zip_read ( $zip );
If (! is_resource ( $entry )) {
Return false;
}
If (zip_entry_name ( $entry ) == $entry_file) {
Break;
}
} while (true);
// Transfer compressed file
zip_entry_open ( $zip, $entry );
file_put_contents ( $tmp_file, zip_entry_read ( $entry, zip_entry_filesize ( $entry ) ) );
zip_entry_close ( $entry );
zip_close ( $zip );
}
// Open file
$this->handle = fopen ( $tmp_file, $mode );
if (! is_resource ( $this->handle )) {
Return false;
}
Return true;
}

/**
  * stream_read
  * @param int $count
  * @return string
 */
public function stream_read($count) {
Return fread ( $this->handle, $count );
}

/**
  * stream_seek
  * @param int $offset
  * @param int $whence=SEEK_SET
  * @return bool
 */
public function stream_seek($offset, $whence = SEEK_SET) {
return fseek ( $this->handle, $offset, $whence );
}

/**
  * stream_set_option
  * @param int $option
  * @param int $arg1
  * @param int $arg2
  * @return bool
 */
public function stream_set_option($option, $arg1, $arg2) {
return false;
}

/**
  * stream_stat
  * @return array
 */
public function stream_stat() {
Return fstat ( $this->handle );
}

/**
  * stream_tell
  * @return int
 */
public function stream_tell() {
return ftell ( $this->handle );
}

/**
  * stream_write
  * @param string $data
  * @return int
 */
public function stream_write($data) {
Return fwrite ( $this->handle, $data );
}

/**
  * url_stat
  * @param string $path
  * @param int $flag
  * @return array
 */
public function url_stat($path, $flag) {
if (! preg_match ( '/^.*?://(.*)$/', $path, $matches )) {
Return false;
}
$tmp_file = self::$extract_dir . DIRECTORY_SEPARATOR . $matches [1];
if (file_exists ( $tmp_file )) {
if ($flag & STREAM_URL_STAT_LINK) {
Return lstat ( $tmp_file );
} else {
Return stat ( $tmp_file );
}
}
if ($flag & STREAM_URL_STAT_QUIET) {
$arr = array ('dev' => 0, 'ino' => 0, 'mode' => 0, 'nlink' => 0, 'uid' => 0, 'gid' => ; 0, 'rdev' => 0, 'size' => 0, 'atime' => 0, 'mtime' => 0, 'ctime' => 0, 'blksize' => 0 , 'blocks' => 0 );
Return array_merge ( array_values ​​( $arr ), $arr );
}
return false;
}
}
?>

include_once 'AdodbZip.php';
$db = AdodbZip::init(NewADOConnection('mysqlt'));
echo $db->GetOne('SELECT NOW()');
?>