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标题: 详解PHP如何批量修改表结构 [打印本页]

作者: 云文章 时间: 2020-5-28 10:30
标题: 详解PHP如何批量修改表结构
PHP如何批量修改表结构？今天小编就为大家带来一篇php批量修改表结构实例。小编觉得挺不错的，现在就分享给大家，也给大家做个参考。一起跟随小编过来看看吧，希望对大家有所帮助。

废话不多说，直接上代码

<?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);
?>

作者: bichao520 时间: 2022-10-14 09:45
源代码在线看

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