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 )
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