深入探讨PHP删除数据库表的具体方式_PHP教程
- WBOY원래의
- 2016-07-15 13:30:06935검색
在我们对网站进行更新维护时，可能对删除相同数据库表的操作比较头疼，今天我们就向大家具体讲解PHP删除数据库表具体实现代码如下
<ol class="dp-xml">
<li class="alt"><span><span>function deldata($dbname,$tableflag){ </span></span></li>
<li>
<span>$</span><span class="attribute">db_host</span><span> = </span><span class="attribute-value">'localhost'</span><span>; </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">db_port</span><span> = </span><span class="attribute-value">'3306'</span><span>; </span>
</li>
<li>
<span>$</span><span class="attribute">db_user</span><span> = </span><span class="attribute-value">'user'</span><span>; </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">db_pass</span><span> = </span><span class="attribute-value">'password'</span><span>; </span>
</li>
<li>
<span>$</span><span class="attribute">connect</span><span> =</span><span class="attribute-value">mysql_connect</span><span>($db_host,$db_user,$db_pass); </span>
</li>
<li class="alt"><span>mysql_select_db($dbname); </span></li>
<li>
<span>$</span><span class="attribute">result</span><span> = </span><span class="attribute-value">mysql_query</span><span>("show table status from $dbname",$connect); </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">data</span><span>=</span><span class="attribute-value">mysql_fetch_array</span><span>($result); </span>
</li>
<li>
<span>while($</span><span class="attribute">data</span><span>=</span><span class="attribute-value">mysql_fetch_array</span><span>($result)) { </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">table</span><span>=</span><span class="attribute-value">mysubstr</span><span>($data[Name],"_"); </span>
</li>
<li>
<span>if($</span><span class="attribute">table</span><span>==$tableflag){ </span>
</li>
<li class="alt"><span>//测试之用 </span></li>
<li><span>/*echo $data[Name]; </span></li>
<li class="alt"><span> echo " </span></li>
<li><span>"; </span></li>
<li class="alt"><span> echo $table; </span></li>
<li><span> echo " </span></li>
<li class="alt"><span>";*/ </span></li>
<li><span>mysql_query("drop table $data[Name]"); </span></li>
<li class="alt"><span>} </span></li>
<li><span>} </span></li>
<li class="alt"><span>return true; </span></li>
<li><span>} </span></li>
<li class="alt"><span>/*截取某个特定字符前的所有字符函数 </span></li>
<li><span>*$str 为待截取字符串 </span></li>
<li class="alt"><span>*$flag 特定字符如“_” </span></li>
<li><span>*/ </span></li>
<li class="alt"><span>function mysubstr($str,$flag){ </span></li>
<li>
<span>$</span><span class="attribute">pos</span><span>=</span><span class="attribute-value">strpos</span><span>($str,$flag); </span>
</li>
<li class="alt"><span>return substr($str,0,$pos); </span></li>
<li><span>} </span></li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
</ol>
<ol class="dp-xml">
<li class="alt"><span><span>$</span><span class="attribute">dbname</span><span>=</span><span class="attribute-value">"shujukuming"</span><span>;//数据库名 </span></span></li>
<li>
<span>$</span><span class="attribute">tableflag</span><span>=</span><span class="attribute-value">"xx"</span><span>;//要删除的表的前缀，有这个前缀的表才删除，标志出是哪一个用户 </span>
</li>
<li class="alt"><span>deldata($dbname,$tableflag); </span></li>
<li>
<span>//$</span><span class="attribute">test</span><span>=</span><span class="attribute-value">mysubstr</span><span>("cdb_account_log","_"); </span>
</li>
<li class="alt"><span>//echo $test; </span></li>
<li>
<span class="tag">?></span><span> </span>
</li>
</ol>
PHP删除数据库表更改之处在：
1.开头处
<ol class="dp-xml">
<li class="alt"><span><span>function deldata($dbname,$tableflag){ </span></span></li>
<li>
<span>$</span><span class="attribute">db_host</span><span> = </span><span class="attribute-value">'localhost'</span><span>; </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">db_port</span><span> = </span><span class="attribute-value">'3306'</span><span>; </span>
</li>
<li>
<span>$</span><span class="attribute">db_user</span><span> = </span><span class="attribute-value">'user'</span><span>; </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">db_pass</span><span> = </span><span class="attribute-value">'password'</span><span>; </span>
</li>
</ol>
改为自己的数据库地址，账号和密码即可
2.结尾处
<ol class="dp-xml">
<li class="alt"><span><span>$</span><span class="attribute">dbname</span><span>=</span><span class="attribute-value">"shujukuming"</span><span>;//数据库名 </span></span></li>
<li>
<span>$</span><span class="attribute">tableflag</span><span>=</span><span class="attribute-value">"xx"</span><span>;//要删除的表的前缀，有这个前缀的表才删除，标志出是哪一个用户 </span>
</li>
<li class="alt"><span>deldata($dbname,$tableflag); </span></li>
<li>
<span>//$</span><span class="attribute">test</span><span>=</span><span class="attribute-value">mysubstr</span><span>("cdb_account_log","_"); </span>
</li>
<li class="alt"><span>//echo $test; </span></li>
<li>
<span class="tag">?></span><span> </span>
</li>
<li class="alt"><span> </span></li>
</ol>
改为自己的数据库名和想删掉的表前缀就可完成PHP删除数据库表。
可以复制上面的代码保存为.php，再上传到空间目录打开
推荐可以下载此.php文件http://flysh.toypark.in//up/1255275586.umd下载后改后缀为php，名字自取再上传打开即可。
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