query_factory.php

一个从zencart中提取出来的php-mysql类

<?php
class queryFactory {

  function queryFactory() {
    $this->count_queries = 0;
    $this->total_query_time = 0;
  }

  function connect($zf_host, $zf_user, $zf_password, $zf_database, $zf_pconnect = 'false', $zp_real = false) {
//@TODO error class required to virtualise & centralise all error reporting/logging/debugging
    $this->database = $zf_database;

    // pconnect disabled
    if (!$zf_pconnect == 'false') {
      $this->link = @mysql_connect($zf_host, $zf_user, $zf_password) or die("mysql failed  1");
    } else {
      $this->link = @mysql_connect($zf_host, $zf_user, $zf_password) or die("mysql failed  2");
    }
	mysql_query("SET NAMES 'utf-8'",$this->link);

    if ($this->link) {
      if (@mysql_select_db($zf_database, $this->link)) {
        $this->db_connected = true;
        return true;
      } else {
        $this->set_error(mysql_errno(),mysql_error(), $zp_real);
        return false;
      }
    } else {
      $this->set_error(mysql_errno(),mysql_error(), $zp_real);
      return false;
    }
  }

  function selectdb($zf_database) {
    @mysql_select_db($zf_database, $this->link);
  }

  function prepare_input($zp_string) {
    if (function_exists('mysql_real_escape_string')) {
      return mysql_real_escape_string($zp_string);
    } elseif (function_exists('mysql_escape_string')) {
      return mysql_escape_string($zp_string);
    } else {
      return addslashes($zp_string);
    }
  }

  function close() {
    @mysql_close($this->link);
  }

  function set_error($zp_err_num, $zp_err_text, $zp_fatal = true) {
    $this->error_number = $zp_err_num;
    $this->error_text = $zp_err_text;
    if ($zp_fatal && $zp_err_num != 1141) {
      $this->show_error();
      die();
    }
  }

  function show_error() {
    echo $this->error_number . ' ' . $this->error_text;
  }

  function Execute($zf_sql, $zf_limit = false, $zf_cache = false, $zf_cachetime=0) {
    global $zc_cache;

//echo "Query: $zf_sql<br>";
    if ($zf_limit) {
      $zf_sql = $zf_sql . ' LIMIT ' . $zf_limit;
    }
    if ( $zf_cache AND $zc_cache->sql_cache_exists($zf_sql) AND !$zc_cache->sql_cache_is_expired($zf_sql, $zf_cachetime) ) {
      $obj = new queryFactoryResult;
      $obj->cursor = 0;
      $obj->is_cached = true;
      $obj->sql_query = $zf_sql;
      $zp_result_array = $zc_cache->sql_cache_read($zf_sql);
      $obj->result = $zp_result_array;
      if (sizeof($zp_result_array) > 0 ) {
        $obj->EOF = false;
        while (list($key, $value) = each($zp_result_array[0])) {
          $obj->fields[$key] = $value;
        }
        return $obj;
      } else {
        $obj->EOF = true;
      }
    } elseif ($zf_cache) {
      $zc_cache->sql_cache_expire_now($zf_sql);
      $time_start = explode(' ', microtime());
      $obj = new queryFactoryResult;
      $obj->sql_query = $zf_sql;
      if (!$this->db_connected) $this->set_error('0', DB_ERROR_NOT_CONNECTED);
      $zp_db_resource = @mysql_query($zf_sql, $this->link);
      if (!$zp_db_resource) $this->set_error(@mysql_errno(),@mysql_error());
      $obj->resource = $zp_db_resource;
      $obj->cursor = 0;
      $obj->is_cached = true;
      if ($obj->RecordCount() > 0) {
        $obj->EOF = false;
        $zp_ii = 0;
	while (!$obj->EOF) {
          $zp_result_array = @mysql_fetch_array($zp_db_resource);
          if ($zp_result_array) {
            while (list($key, $value) = each($zp_result_array)) {
              if (!ereg('^[0-9]', $key)) {
                $obj->result[$zp_ii][$key] = $value;
              }
            }
          } else {
            $obj->Limit = $zp_ii;
            $obj->EOF = true;
          }
          $zp_ii++;
	}
        while (list($key, $value) = each($obj->result[$obj->cursor])) {
          if (!ereg('^[0-9]', $key)) {
            $obj->fields[$key] = $value;
	  }
        }
        $obj->EOF = false;
      } else {
	$obj->EOF = true;
      }
      $zc_cache->sql_cache_store($zf_sql, $obj->result);
      $time_end = explode (' ', microtime());
      $query_time = $time_end[1]+$time_end[0]-$time_start[1]-$time_start[0];
      $this->total_query_time += $query_time;
      $this->count_queries++;
      return($obj);
    } else {
      $time_start = explode(' ', microtime());
      $obj = new queryFactoryResult;
      if (!$this->db_connected) $this->set_error('0', DB_ERROR_NOT_CONNECTED);
      $zp_db_resource = @mysql_query($zf_sql, $this->link);
      if (!$zp_db_resource) $this->set_error(@mysql_errno($this->link),@mysql_error($this->link));
      $obj->resource = $zp_db_resource;
      $obj->cursor = 0;
      if ($obj->RecordCount() > 0) {
        $obj->EOF = false;
        $zp_result_array = @mysql_fetch_array($zp_db_resource);
        if ($zp_result_array) {
          while (list($key, $value) = each($zp_result_array)) {
            if (!ereg('^[0-9]', $key)) {
              $obj->fields[$key] = $value;
            }
          }
          $obj->EOF = false;
        } else {
          $obj->EOF = true;
        }
      } else {
        $obj->EOF = true;
      }

      $time_end = explode (' ', microtime());
      $query_time = $time_end[1]+$time_end[0]-$time_start[1]-$time_start[0];
      $this->total_query_time += $query_time;
      $this->count_queries++;
      return($obj);
    }
  }

  function ExecuteRandomMulti($zf_sql, $zf_limit = 0, $zf_cache = false, $zf_cachetime=0) {
    $time_start = explode(' ', microtime());
    $obj = new queryFactoryResult;
    $obj->result = array();
    if (!$this->db_connected) $this->set_error('0', DB_ERROR_NOT_CONNECTED);
    $zp_db_resource = @mysql_query($zf_sql);
    if (!$zp_db_resource) $this->set_error(mysql_errno(),mysql_error());
    $obj->resource = $zp_db_resource;
    $obj->cursor = 0;
    $obj->Limit = $zf_limit;
    if ($obj->RecordCount() > 0 && $zf_limit > 0) {
      $obj->EOF = false;
      $zp_Start_row = 0;
      if ($zf_limit) {
      $zp_start_row = zen_rand(0, $obj->RecordCount() - $zf_limit);
      }
      $obj->Move($zp_start_row);
      $obj->Limit = $zf_limit;
      $zp_ii = 0;
      while (!$obj->EOF) {
        $zp_result_array = @mysql_fetch_array($zp_db_resource);
        if ($zp_ii == $zf_limit) $obj->EOF = true;
        if ($zp_result_array) {
          while (list($key, $value) = each($zp_result_array)) {
            $obj->result[$zp_ii][$key] = $value;
          }
        } else {
          $obj->Limit = $zp_ii;
          $obj->EOF = true;
        }
        $zp_ii++;
      }
      $obj->result_random = array_rand($obj->result, sizeof($obj->result));
      if (is_array($obj->result_random)) {
        $zp_ptr = $obj->result_random[$obj->cursor];
      } else {
        $zp_ptr = $obj->result_random;
      }
      while (list($key, $value) = each($obj->result[$zp_ptr])) {
        if (!ereg('^[0-9]', $key)) {
          $obj->fields[$key] = $value;
	}
      }
      $obj->EOF = false;
    } else {
      $obj->EOF = true;
    }


    $time_end = explode (' ', microtime());
    $query_time = $time_end[1]+$time_end[0]-$time_start[1]-$time_start[0];
    $this->total_query_time += $query_time;
    $this->count_queries++;
    return($obj);
  }

  function insert_ID() {
    return @mysql_insert_id($this->link);
  }

  function metaColumns($zp_table) {
    $res = @mysql_query("select * from " . $zp_table . " limit 1", $this->link);
    $num_fields = @mysql_num_fields($res);
    for ($i = 0; $i < $num_fields; $i++) {
     $obj[strtoupper(@mysql_field_name($res, $i))] = new queryFactoryMeta($i, $res);
    }
    return $obj;

  }

  function get_server_info() {
    if ($this->link) {
      return mysql_get_server_info($this->link);
    } else {
      return UNKNOWN;
    }
  }

  function queryCount() {
    return $this->count_queries;
  }

  function queryTime() {
    return $this->total_query_time;
  }

}

class queryFactoryResult {

  function queryFactoryResult() {
    $this->is_cached = false;
  }

  function MoveNext() {
    global $zc_cache;
    $this->cursor++;
    if ($this->is_cached) {
      if ($this->cursor >= sizeof($this->result)) {
        $this->EOF = true;
      } else {
        while(list($key, $value) = each($this->result[$this->cursor])) {
	  $this->fields[$key] = $value;
	}
      }
    } else {
      $zp_result_array = @mysql_fetch_array($this->resource);
      if (!$zp_result_array) {
        $this->EOF = true;
      } else {
        while (list($key, $value) = each($zp_result_array)) {
          if (!ereg('^[0-9]', $key)) {
            $this->fields[$key] = $value;
          }
        }
      }
    }
  }

  function MoveNextRandom() {
    $this->cursor++;
    if ($this->cursor < $this->Limit) {
      $zp_result_array = $this->result[$this->result_random[$this->cursor]];
      while (list($key, $value) = each($zp_result_array)) {
        if (!ereg('^[0-9]', $key)) {
          $this->fields[$key] = $value;
	}
      }
    } else {
      $this->EOF = true;
    }
  }

    function RecordCount() {
    return @mysql_num_rows($this->resource);
  }

  function Move($zp_row) {
    global $db;
    if (@mysql_data_seek($this->resource, $zp_row)) {
      $zp_result_array = @mysql_fetch_array($this->resource);
        while (list($key, $value) = each($zp_result_array)) {
          $this->fields[$key] = $value;
        }
      @mysql_data_seek($this->resource, $zp_row);
      $this->EOF = false;
      return;
    } else {
      $this->EOF = true;
      $db->set_error(mysql_errno(),mysql_error());
    }
  }
  
  function close()
  {
  	mysql_free_result($this->resource);
  }
}

class queryFactoryMeta {

  function queryFactoryMeta($zp_field, $zp_res) {
    $this->type = @mysql_field_type($zp_res, $zp_field);
    $this->max_length = @mysql_field_len($zp_res, $zp_field);
  }
}
?>