php批量修改表结构实例

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PHP实例废话不多说,直接上代码

PHP实例
<?PHP
set_time_limit(0);
$con = MysqL_connect("localhost","root","root");
$dbname = "db";
if ($con) {
 if (MysqL_select_db($dbname,$con)) {
  $sql = "show tables like 'pre_tb_%'";
  $ret = MysqL_query($sql);
  while($row = MysqL_fetch_assoc($ret)){
   $info1[] = $row;
  }
  foreach ($info1 as $v) {
   $chidarr1[] = substr($v['Tables_in_multiopen (pre_tb_%)'],7);//获取标记号
  }
  foreach ($chidarr1 as $val) {
   $tabname = 'stat_adclick_'.$val;
   $sql = "alter table $tabname add column c2 int default 0 after p";
   MysqL_query($sql);
   $sql = "alter table $tabname DROP PRIMARY KEY";
   MysqL_query($sql);
   $sql = "alter table $tabname add primary key(c2,p)";
   MysqL_query($sql);
   $sql = "alter table $tabname drop index old_index";
   MysqL_query($sql);
   $sql = "create index idx_newincex on $tabname (c2,p)";
   MysqL_query($sql);
  }
 }
}
MysqL_close($con);
?>

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