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mysqli_fetch_lengths

(PHP 5)

(no version information, might be only in CVS)

result->lengths -- Returns the lengths of the columns of the current row in the result set

Description

Процедурный стиль:

mixed mysqli_fetch_lengths ( mysqli_result result )

Объектно-ориентированный стиль (property):

class mysqli_result {

mixed lengths

}

The mysqli_fetch_lengths() function returns an array containing the lengths of every column of the current row within the result set represented by the result parameter. If successful, a numerically indexed array representing the lengths of each column is returned or FALSE on failure.

Возвращаемые значения

An array of integers representing the size of each column (not including any terminating null characters). FALSE if an error occurred.

mysqli_fetch_lengths() is valid only for the current row of the result set. It returns FALSE if you call it before calling mysqli_fetch_row/array/object or after retrieving all rows in the result.

Примеры

Пример 1. Объектно-ориентированный стиль


<?php

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




/* check connection */


if (
mysqli_connect_errno
()) {

    
printf
(
"Connect failed: %s\n"
, 
mysqli_connect_error
());

    exit();

}




$query 
= 
"SELECT * from Country ORDER BY Code LIMIT 1"
;



if (
$result 
= 
$mysqli
->
query
(
$query
)) {



    
$row 
= 
$result
->
fetch_row
();



    
/* display column lengths */

    
for (
$i
=
0
; 
$i 
< 
count
(
$result
->
lengths
); 
$i
++) {

        
printf
(
"Field %2d has Length %2d\n"
, 
$i
+
1
, 
$result
->
lengths
[
$i
]);

    }

    
$result
->
close
();

}




/* close connection */


$mysqli
->
close
();


?>

Пример 2. Процедурный стиль


<?php

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




/* check connection */


if (
mysqli_connect_errno
()) {

    
printf
(
"Connect failed: %s\n"
, 
mysqli_connect_error
());

    exit();

}




$query 
= 
"SELECT * from Country ORDER BY Code LIMIT 1"
;



if (
$result 
= 
mysqli_query
(
$link
, 
$query
)) {



    
$row 
= 
mysqli_fetch_row
(
$result
);



    
/* display column lengths */

    
$lengths 
= 
mysqli_fetch_lengths
(
$result
);

    for (
$i
=
0
; 
$i 
< 
count
(
$lengths
); 
$i
++) {

        
printf
(
"Field %2d has Length %2d\n"
, 
$i
+
1
, 
$lengths
[
$i
]);

    }

    
mysqli_free_result
(
$result
);

}




/* close connection */


mysqli_close
(
$link
);


?>

Результат выполнения данного примера:

Field  1 has Length  3
Field  2 has Length  5
Field  3 has Length 13
Field  4 has Length  9
Field  5 has Length  6
Field  6 has Length  1
Field  7 has Length  6
Field  8 has Length  4
Field  9 has Length  6
Field 10 has Length  6
Field 11 has Length  5
Field 12 has Length 44
Field 13 has Length  7
Field 14 has Length  3
Field 15 has Length  2

Все функции PHP: