PHP. Руководство по PHP. 2005

maxdb_fetch_lengths

(PECL)maxdb_fetch_lengths

(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

Procedural style:array maxdb_fetch_lengths (resource result)

Object oriented style (property):class result {

array lengths

}

The maxdb_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.

Return values

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

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

Example

Пример 1. Object oriented style


<?php
$maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()){
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
$query = "SELECT * from hotel.customer WHERE cno = 3000";
if ($result = $maxdb->query($query)){
$row = $result->fetch_row();
/* display column lengths */
foreach ($result->lengths as $i => $val){
printf("Field %2d has Length %2d\n", $i+1, $val);
}
$result->close();
}
/* close connection */
$maxdb->close();
?>

Пример 2. Procedural style


<?php
$link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");
/* check connection */
if (maxdb_connect_errno()){
printf("Connect failed: %s\n", maxdb_connect_error());
exit();
}
$query = "SELECT * from hotel.customer WHERE cno = 3000";
if ($result = maxdb_query($link, $query)){
$row = maxdb_fetch_row($result);
/* display column lengths */
foreach (maxdb_fetch_lengths($result) as $i => $val){
printf("Field %2d has Length %2d\n", $i+1, $val);
}
maxdb_free_result($result);
}
/* close connection */
maxdb_close($link);
?>

The above examples would produce the following output:

Field 1 has Length 4

Field 2 has Length 3

Field 3 has Length 5

Field 4 has Length 6

Field 5 has Length 5

Field 6 has Length 21

maxdb_fetch_fields

maxdb_fetch_object

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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