Copyright 1997-2022 the PHP Documentation Group.
mysqli_result::$lengths
mysqli_fetch_lengths
Returns the lengths of the columns of the current row in the result set
Description
Object-oriented style
array|null mysqli_result->lengths ;
Procedural style
array|false 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
mysqli_result
object returned bymysqli_query
,mysqli_store_result
,mysqli_use_result
ormysqli_stmt_get_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 7.132 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 7.133 Procedural style
<?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 */
foreach (mysqli_fetch_lengths($result) as $i => $val) {
printf("Field %2d has Length %2d\n", $i+1, $val);
}
mysqli_free_result($result);
}
/* close connection */
mysqli_close($link);
?>
The above examples will output:
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