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：

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：

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：

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

{

$field = mysql_fetch_field($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

)

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