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php 获取mysql数据库信息代码_php技巧

May 17, 2016 am 09:33 AM
mysql php information database

复制代码 代码如下:

@mysql_connect("localhost", "root","1981427") //选择数据库之前需要先连接数据库服务器
or die("数据库服务器连接失败");
$dbs = mysql_list_dbs(); //调用mysql_list_dbs函数
while ($array = mysql_fetch_row($dbs)) //循环输出所有的数据库名称
{
echo "$array[0]
";
}
?>

复制代码 代码如下:

@mysql_connect("localhost", "root","1981427") //选择数据库之前需要先连接数据库服务器
or die("数据库服务器连接失败");
$dbs = mysql_list_tables("test"); //调用mysql_list_tables函数
while ($array = mysql_fetch_row($dbs)) //循环输出所有的表名称
{
echo "$array[0]
";
}
?>

复制代码 代码如下:

mysql_connect("localhost","root","1981427"); //连接服务器
mysql_select_db("test"); //选择数据库
$result = mysql_query("SELECT * FROM tablename1"); //执行查询操作
echo mysql_num_fields($result); //获取列的数目
?>

复制代码 代码如下:

mysql_connect("localhost","root","1981427");
mysql_select_db("test");
$result = mysql_query("SELECT * FROM tablename1");
echo mysql_field_name($result,0); //获取列的名称
?>

复制代码 代码如下:

mysql_connect("localhost","root","1981427");
mysql_select_db("test");
$result = mysql_query("SELECT * FROM tablename1");
echo mysql_field_type($result,0); //获取列的数据类型
?>

复制代码 代码如下:

mysql_connect("localhost","root","1981427");
mysql_select_db("test");
$result = mysql_query("SELECT * FROM tablename1");
echo mysql_field_len($result,0); //获取列的长度
?>

复制代码 代码如下:

mysql_connect("localhost","root","1981427");
mysql_select_db("test");
$result = mysql_query("SELECT * FROM tablename1");
echo mysql_field_flag($result,0); //获取列的标志
?>

复制代码 代码如下:

mysql_connect("localhost","root","1981427"); //连接服务器
mysql_select_db("test"); //选择数据库
echo ""; //输出表头
echo "";
$result = mysql_query("SELECT * FROM tablename1"); //在mytable表上执行SQL语句
$fields = mysql_num_fields($result); //获得列的数目
for($i=0; $i{
//获得列的各个属性
$name = mysql_field_name($result,$i); //获得列的名称
$type = mysql_field_type($result,$i); //获得列的类型
$length = mysql_field_len($result,$i); //获得列的长度
$flags = mysql_field_flags($result,$i); //获得列的标志
echo "


";
//输出列的信息
}
echo "
列名 类型 长度 标志
$name $type $length $flags
";
mysql_close(); //关闭与数据库的连接
?>
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