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：
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：
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：
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
)
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