CMS AP-Fusion - движок для вашего сайта

mysqli_field_count

(PHP 5)

mysqli_field_count

(no version information, might be only in CVS)

mysqli->field_count -- Returns the number of columns for the most recent query

Description

Процедурный стиль:

int mysqli_field_count ( mysqli link )

Объектно-ориентированный стиль (method):

class mysqli {
int field_count ( void )
}

Returns the number of columns for the most recent query on the connection represented by the link parameter. This function can be useful when using the mysqli_store_result() function to determine if the query should have produced a non-empty result set or not without knowing the nature of the query.

Возвращаемые значения

An integer representing the number of fields in a result set

Примеры

Пример 1. Объектно-ориентированный стиль


<?php

$mysqli 
= new 
mysqli
(
"localhost"
, 
"my_user"
, 
"my_password"
, 
"test"
);




$mysqli
->
query
( 
"DROP TABLE IF EXISTS friends"
); 


$mysqli
->
query
( 
"CREATE TABLE friends (id int, name varchar(20))"
); 

 


$mysqli
->
query
( 
"INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')"
);






$mysqli
->
real_query
(
$HTTP_POST_VARS
[
'query'
]);



if (
mysqli_field_count
(
$link
)) {

    
/* this was a select/show or describe query */

    
$result 
= 
$mysqli
->
store_result
();

    

    
/* process resultset */

    
$row 
= 
$result
->
fetch_row
();



    
/* free resultset */

    
$result
->
close
();

}




/* close connection */


$mysqli
->
close
();


?>

Пример 2. Процедурный стиль


<?php

$link 
= 
mysqli_connect
(
"localhost"
, 
"my_user"
, 
"my_password"
, 
"test"
);




mysqli_query
(
$link
, 
"DROP TABLE IF EXISTS friends"
); 


mysqli_query
(
$link
, 
"CREATE TABLE friends (id int, name varchar(20))"
); 

 


mysqli_query
(
$link
, 
"INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')"
);




mysqli_real_query
(
$link
, 
$HTTP_POST_VARS
[
'query'
]);



if (
mysqli_field_count
(
$link
)) {

    
/* this was a select/show or describe query */

    
$result 
= 
mysqli_store_result
(
$link
);

    

    
/* process resultset */

    
$row 
= 
mysqli_fetch_row
(
$result
);



    
/* free resultset */

    
mysqli_free_result
(
$result
);

}




/* close connection */


mysqli_close
(
$link
);


?>

Все функции PHP: