MySQL Improved Extension (
Mysqli
)
2503
Object oriented style
array
mysqli_result->lengths ;
Procedural style
array mysqli_fetch_lengths(
mysqli_result result);
The
mysqli_fetch_lengths
function returns an array containing the lengths of every column of the
current row within the result set.
Parameters
result
Procedural style only: A result set identifier returned
by
mysqli_query
,
mysqli_store_result
or
mysqli_use_result
.
Return Values
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.
Examples
Example 20.205. Object oriented style
<?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 = $result->fetch_row();
/* display column lengths */
foreach ($result->lengths as $i => $val) {
printf("Field %2d has Length %2d\n", $i+1, $val);
}
$result->close();
}
/* close connection */
$mysqli->close();
?>
Example 20.206. Procedural style
<?php
$link = mysqli_connect("localhost", "my_user", "my_password", "world");
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