php代码备份mysql数据库

这段php代码可以用来备份mysql数据库或者mysql表

<?php
$Database_name = 'somedb';
$table = 'sometable';
 
     Define ('H', 'localhost'); define ('N', 'root') define ('P','password'); define ('T', $database_name);
     Mysql_connect (H, N, P) or die (mysql_error ()); mysql_select_db (T) or die (mysql_error ());
 
     function Escape($v){return mysql_real_escape_string($v);}
 
     Define('FILE', 'C:/Program Files/EasyPHP 2.0b1/www/'. $table .'/'. date ('d').'-'. date (' m').'-' . date ('Y').'.php');
     Define('FP', fopen(FILE,'w'));
 
     $aa = mysql_list_tables($database_name); while ($a = mysql_fetch_row($aa))
     {
 
			 $bb = mysql_query ('SELECT * FROM'. $a[0].''); $tt = mysql_num_rows($bb); $nb = mysql_num_fields($bb);
			 If($tt>0) 
			 {
				 $p = 'INSERT INTO'. $a[0]. " VALUES ';
 
				 $t = 0;
				 while ($b = mysql_fetch_array($bb)) 
				 {
					 $ p .='(';
					 For ($i=0;$i<$nb, $i++) 
 
					 {
							if ($i==0) 
							{
								$p .= "'$b[$i]'";
							}
							else
							{
								$p .=' , ''. Escape($b[$ i]). ''';
							}
					 }
					 $t++;
 
					 if ($t<$tt) 
					 {
						 $ p .='),'."  n ";
					 }
					 else
					 {
						$ p .=');'."  n";
					 }
				 } 
				 $p .= "nnn";
				 fwrite(FP, $p);
			 }
     }
 
     fclose(FP);
?>