(PECL maxdb >= 1.0)
maxdb_fetch_lengths -- maxdb_result::lengths — Returns the lengths of the columns of the current row in the result set
Estilo procedural
$result
) : arrayEstilo orientado à objeto
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 ou FALSE
em caso de falha.
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.
Exemplo #1 Estilo orientado à objeto
<?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();
?>
Exemplo #2 Estilo procedural
<?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);
?>
O exemplo acima irá imprimir algo similar à:
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