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Implementation method of php database deletion

Nov 05, 2020 am 09:55 AM
php

php删除数据库的方法:首先创建一个PHP示例文件;然后通过mysql_connect函数连接数据库;最后通过执行语句“DROP DATABASE test_db”来删除数据库即可。

Implementation method of php database deletion

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使用 PHP 删除 MySQL 数据库

删除一个数据库

如果数据库不再需要那么它将可以被永远删除。您可以使用 SQL 命令传递给 mysql_query 执行删除一个数据库。

例子

尝试以下例子来删除一个数据库。

<?php
    $dbhost = &#39;localhost:3036&#39;;
    $dbuser = &#39;root&#39;;
    $dbpass = &#39;rootpassword&#39;;
    $conn = mysql_connect($dbhost, $dbuser, $dbpass);
    if(! $conn )
    {
      die(&#39;Could not connect: &#39; . mysql_error());
    }
    $sql = &#39;DROP DATABASE test_db&#39;;
    $retval = mysql_query( $sql, $conn );
    if(! $retval )
    {
      die(&#39;Could not delete database db_test: &#39; . mysql_error());
    }
    echo "Database deleted successfully\\n";
    mysql_close($conn);
    ?>
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警告:对于删除一个数据库和表,它是非常危险的。所以删除任何表或数据库之前你应该确保你所做的一切是自愿的。

删除一个表

它通过 mysql_query 函数再次的发出一个 SQL 命令来删除任何数据库和数据表。但使用这个命令时要非常小心,因为这样做你可以在你的桌面上删除一些重要的信息。

尝试以下示例删除一个表:

<?php
    $dbhost = &#39;localhost:3036&#39;;
    $dbuser = &#39;root&#39;;
    $dbpass = &#39;rootpassword&#39;;
    $conn = mysql_connect($dbhost, $dbuser, $dbpass);
    if(! $conn )
    {
      die(&#39;Could not connect: &#39; . mysql_error());
    }
    $sql = &#39;DROP TABLE employee&#39;;
    $retval = mysql_query( $sql, $conn );
    if(! $retval )
    {
      die(&#39;Could not delete table employee: &#39; . mysql_error());
    }
    echo "Table deleted successfully\\n";
    mysql_close($conn);
    ?>
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