maxdb_fetch_lengths

result->lengths

(No version information available, might be only in CVS)

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

说明

Procedural style:

array maxdb_fetch_lengths ( resource $result )

Object oriented style (property):

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.

返回值

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.

范例

Example#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();
?>

Example#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


	PHP5中文手册 maxdb_fetch_fields maxdb_fetch_object MaxDB PHP Manual maxdb_fetch_lengths result->lengths (No version information available, might be only in CVS) result->lengths — Returns the lengths of the columns of the current row in the result set 说明 Procedural style: array maxdb_fetch_lengths ( resource `$result` ) Object oriented style (property): result array`$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. 返回值 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. 范例 Example#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(); ?> Example#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 MaxDB PHP Manual