php mysql获取表字段名称和字段信息的三种方法

php mysql获取表字段名称和字段信息的三种方法

先给出本实例中使用的表的信息：

使用desc获取表字段信息

php代码如下：

<?php   mysql_connect("localhost","root","");  mysql_select_db("test");  $query = "desc student";  $result = mysql_query($query);  while($row=mysql_fetch_assoc($result)){ print_r($row);  }?>

运行结果：

Array(  [Field] => student_id  [Type] => int(4)  [Null] => NO  [Key] => PRI  [Default] =>   [Extra] => auto_increment)Array(  [Field] => student_name  [Type] => varchar(50)  [Null] => NO  [Key] =>   [Default] =>   [Extra] => )Array(  [Field] => class_id  [Type] => int(4)  [Null] => NO  [Key] =>   [Default] =>   [Extra] => )Array(  [Field] => total_score  [Type] => int(4)  [Null] => NO  [Key] =>   [Default] =>   [Extra] => ) 

使用SHOW FULL FIELDS获取表字段信息

php代码如下：

<?php   mysql_connect("localhost","root","");  mysql_select_db("test");  $query = "SHOW FULL COLUMNS FROM student";  $result = mysql_query($query);  while($row=mysql_fetch_assoc($result)){ print_r($row);  }?>

运行结果：

Array(  [Field] => student_id  [Type] => int(4)  [Collation] =>   [Null] => NO  [Key] => PRI  [Default] =>   [Extra] => auto_increment  [Privileges] => select,insert,update,references  [Comment] => )Array(  [Field] => student_name  [Type] => varchar(50)  [Collation] => latin1_swedish_ci  [Null] => NO  [Key] =>   [Default] =>   [Extra] =>   [Privileges] => select,insert,update,references  [Comment] => )Array(  [Field] => class_id  [Type] => int(4)  [Collation] =>   [Null] => NO  [Key] =>   [Default] =>   [Extra] =>   [Privileges] => select,insert,update,references  [Comment] => )Array(  [Field] => total_score  [Type] => int(4)  [Collation] =>   [Null] => NO  [Key] =>   [Default] =>   [Extra] =>   [Privileges] => select,insert,update,references  [Comment] => ) 

使用mysql_fetch_field方法获取表字段信息

php代码如下：

<?php  mysql_connect("localhost","root","");  mysql_select_db("test");  $query = "SELECT * FROM student LIMIT 1";  $result = mysql_query($query);  $fields = mysql_num_fields($result);  for($count=0;$count<$fields;$count++)  {   $field = mysql_fetch_field($result,$count);  print_r($field);  }?>

运行结果如下：

stdClass Object(  [name] => student_id  [table] => student  [def] =>   [max_length] => 1  [not_null] => 1  [primary_key] => 1  [multiple_key] => 0  [unique_key] => 0  [numeric] => 1  [blob] => 0  [type] => int  [unsigned] => 0  [zerofill] => 0)stdClass Object(  [name] => student_name  [table] => student  [def] =>   [max_length] => 5  [not_null] => 1  [primary_key] => 0  [multiple_key] => 0  [unique_key] => 0  [numeric] => 0  [blob] => 0  [type] => string  [unsigned] => 0  [zerofill] => 0)stdClass Object(  [name] => class_id  [table] => student  [def] =>   [max_length] => 1  [not_null] => 1  [primary_key] => 0  [multiple_key] => 0  [unique_key] => 0  [numeric] => 1  [blob] => 0  [type] => int  [unsigned] => 0  [zerofill] => 0)stdClass Object(  [name] => total_score  [table] => student  [def] =>   [max_length] => 3  [not_null] => 1  [primary_key] => 0  [multiple_key] => 0  [unique_key] => 0  [numeric] => 1  [blob] => 0  [type] => int  [unsigned] => 0  [zerofill] => 0)