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实例讲解php中adodbzip类的使用方法

PHPz
Release: 2018-10-24 14:23:43
Original
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这篇文章主要介绍了php中adodbzip类,以实例形式详细讲述了adodbzip类文件的实现方法与使用技巧,注释中包含详尽的功能说明,非常具有实用价值,需要的朋友可以参考下

代码如下:

<?php 
/** 
 * AdodbZip 1.1 
 *  
 * 代码示例: 
 * include_once &#39;AdodbZip.php&#39;; 
 * $db = AdodbZip::init(NewADOConnection(&#39;mysql教程t&#39;)); 
 * echo $db->GetOne(&#39;SELECT NOW()&#39;); 
 *  
 * 流程说明: 
 * 1. 如果$extract_dir里的Adodb程序文件存在,并且$zip_file不存在;则使用$extract_dir里的Adodb程序文件。 
 * 2. 如果$extract_dir里的Adodb程序文件存在,并且$zip_file存在;则比较修改时间,$extract_dir里的Adodb程序文件更新为较新的。 
 * 3. 如果$extract_dir里的Adodb程序文件不存在,并且$zip_file存在;则$extract_dir里的Adodb程序文件从$zip_file解压获得。 
 * 4. 如果 $extract_dir里的Adodb程序文件不存在,并且$zip_file不存在;则从$zip_url下载Adodb的Zip文件,并解压Adodb的程序文件。 
 * 其他说明: 
 * 1. $extract_dir可自定义。如果将Adodb的Zip包完全解压到此目录,则可忽略$zip_url和$zip_file设置项,这和传统使用Adodb一样。 
 * 2. $zip_file可自定义。如果$zip_file存在,则可忽略$zip_url,这样可整站统一使用$zip_file。 
 * 3. $zip_url可自定义。可随时修改Adodb版本,此时$zip_file和$extract_dir最好使用默认值,各版本互不干扰。 
 * 4. $server、$user、$pwd、$db可自定义。默认是mysql默认值,此项只有调用AdodbZip::init方法后才起效果。 
 * 5. $charset可自定义。默认不改变编码,此项只有调用AdodbZip::init方法后才起效果。 
 * 6. AdodbZip::init方法里可增加Adodb初始化值。 
 */ 
 
/** 
 * AdodbZip启动项 
 */ 
// 设定参数 
AdodbZip::$zip_url = &#39;http://c.net教程works-kr-1.dl.sourceforge.net/project/adodb/adodb-php5-only/adodb-509-for-php5/adodb509.zip&#39;; //[设置项]Adodb的Zip文件下载地址,文件比较大建议先下载或者解压 
AdodbZip::$zip_file = sys_get_temp_dir () . preg_replace ( &#39;/^.*/(adodb.*?.zip)$/i&#39;, &#39;adodb/$1&#39;, AdodbZip::$zip_url ); //[设置项]Adodb的Zip文件缓存位置 
AdodbZip::$entry_dir = &#39;adodb5&#39;; 
AdodbZip::$extract_dir = sys_get_temp_dir () . &#39;adodb/&#39; . AdodbZip::$entry_dir; //[设置项]Adodb程序文件缓存位置 
AdodbZip::$server = &#39;localhost&#39;; //[设置项]服务器  
AdodbZip::$user = &#39;root&#39;; //[设置项]用户名 
AdodbZip::$pwd = &#39;&#39;; //[设置项]密码 
AdodbZip::$db = &#39;test&#39;; //[设置项]数据库教程 
AdodbZip::$charset = &#39;&#39;; //[设置项]编码 
 
// 注册协议 
if (! in_array ( &#39;AdodbZip&#39;, stream_get_wrappers () )) { 
 stream_wrapper_register ( &#39;AdodbZip&#39;, &#39;AdodbZip&#39; ); 
} 
// 定义常量 
if (! defined ( &#39;ADODB_DIR&#39; )) { 
 define ( &#39;ADODB_DIR&#39;, &#39;AdodbZip:/&#39; ); 
} 
// 包含程序 
require_once (ADODB_DIR . &#39;/adodb.inc.php&#39;); 
// $db = AdodbZip::init(NewADOConnection(&#39;mysqlt&#39;)); // [选择项]引用即定义$db 
// return AdodbZip::init(NewADOConnection(&#39;mysqlt&#39;)); // [选择项]引用即返回$db,注意只可引用一次。 
 
/** 
 * AdodbZip类定义 
 */ 
class AdodbZip { 
  
 /** 
  * Adodb变量 
  */ 
 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变量 
  */ 
 private $handle; 
 public $context; 
  
 /** 
  * Adodb函数组 
  */ 
  
 /** 
  * init 
  * @param adodb &$adodb 
  * @return adodb 
  */ 
 public static function init(&$adodb) { 
  $adodb->Connect ( self::$server, self::$user, self::$pwd, self::$db ); 
  if(self::$charset!=&#39;&#39;){ 
   $adodb->Execute(&#39;SET NAMES &#39;.self::$charset.&#39;;&#39;); 
  } 
  return $adodb; 
 } 
  
 /** 
  * Stream函数组 
  */ 
  
 /** 
  * __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 ( &#39;/^.*?://(.*)$/&#39;, $path, $matches )) { 
   return false; 
  } 
  $tmp_file = self::$extract_dir . DIRECTORY_SEPARATOR . $matches [1]; 
  $entry_file = self::$entry_dir . &#39;/&#39; . str_replace ( &#39;\&#39;, &#39;/&#39;, $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 ( &#39;Content-type: text/html;charset=utf-8&#39; ); 
      die ( &#39;请创建目录 &#39; . $zip_dir ); 
     } 
    } 
    // 下载文件 
    if (! file_exists ( self::$zip_file )) { 
     $break = true; 
     do { 
      $url_arr = parse_url ( self::$zip_url ); 
      $fp = fsockopen ( $url_arr [&#39;host&#39;], isset ( $url_arr [&#39;port&#39;] ) ? ( int ) $url_arr [&#39;port&#39;] : 80, $errno, $errstr, 10 ); 
      if ($fp === false) { 
       break; 
      } 
      $out = "GET " . $url_arr [&#39;path&#39;] . " HTTP/1.0rnHost: " . $url_arr [&#39;host&#39;] . " rnConnection: closernrn"; 
      fputs ( $fp, $out ); 
      if (feof ( $fp )) { 
       break; 
      } 
      $buffer = fgets ( $fp, 1024 ); 
      if (! preg_match ( &#39;/^HTTP/1.d 200 /i&#39;, $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 ( &#39;/^Content-Length:s*(d+)/i&#39;, $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 ( &#39;Content-type: text/html;charset=utf-8&#39; ); 
      die ( &#39;请下载文件 <a href="&#39; . self::$zip_url . &#39;">&#39; . self::$zip_url . &#39;.zip</a > 保存为 &#39; . self::$zip_file ); 
     } 
    } 
   } 
   // 创建目录 
   $tmp_dir = dirname ( $tmp_file ); 
   if (! is_dir ( $tmp_dir )) { 
    if (mkdir ( $tmp_dir, 0777, true ) === false) { 
     header ( &#39;Content-type: text/html;charset=utf-8&#39; ); 
     die ( &#39;请创建目录 &#39; . $tmp_dir ); 
    } 
   } 
   // 打开压缩文件 
   $zip = zip_open ( $zip_file ); 
   if (! is_resource ( $zip )) { 
    return false; 
   } 
   // 寻找解压文件 
   do { 
    $entry = zip_read ( $zip ); 
    if (! is_resource ( $entry )) { 
     return false; 
    } 
    if (zip_entry_name ( $entry ) == $entry_file) { 
     break; 
    } 
   } while ( true ); 
   // 转存压缩文件 
   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 ); 
  } 
  // 打开文件 
  $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, $flag) { 
  if (! preg_match ( &#39;/^.*?://(.*)$/&#39;, $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 (&#39;dev&#39; => 0, &#39;ino&#39; => 0, &#39;mode&#39; => 0, &#39;nlink&#39; => 0, &#39;uid&#39; => 0, &#39;gid&#39; => 0, &#39;rdev&#39; => 0, &#39;size&#39; => 0, &#39;atime&#39; => 0, &#39;mtime&#39; => 0, &#39;ctime&#39; => 0, &#39;blksize&#39; => 0, &#39;blocks&#39; => 0 ); 
   return array_merge ( array_values ( $arr ), $arr ); 
  } 
  return false; 
 } 
} 
?>
Copy after login

使用实例代码如下:

代码如下:

<?php 
 include_once &#39;AdodbZip.php&#39;;  
 $db = AdodbZip::init(NewADOConnection(&#39;mysqlt&#39;));  
 echo $db->GetOne(&#39;SELECT NOW()&#39;);  
 ?>
Copy after login

也是两步

1. 包含AdodbZip.php文件

2. AdodbZip::init(...)函数对adodb连接类进行初始化

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