PHP lengths / mysqli_fetch_lengths() Function
Example - Object Oriented style
Return the length of the fields of the current row in the result-set:
<?php
$mysqli = new mysqli("localhost","my_user","my_password","my_db");
if ($mysqli -> connect_errno) {
echo "Failed to connect to MySQL: " .
$mysqli -> connect_error;
exit();
}
$sql = "SELECT * FROM Persons ORDER BY Lastname";
if ($result = $mysqli -> query($sql)) {
$row =
$result -> fetch_row();
// Display field lengths
foreach ($result
-> lengths as $i => $val) {
printf("Field %2d has length: %2d\n", $i + 1, $val);
}
$result
-> free_result();
}
$mysqli -> close();
?>
Look at example of procedural style at the bottom.
Definition and Usage
The lengths / mysqli_fetch_lengths() function returns the length of the fields of the current row in the result-set.
Syntax
Object oriented style:
$mysqli_result -> lengths
Procedural style:
mysqli_fetch_lengths(result)
Parameter Values
| Parameter | Description |
|---|---|
| result | Required. Specifies a result set identifier returned by mysqli_query(), mysqli_store_result() or mysqli_use_result() |
Technical Details
| Return Value: | Returns an array of integers that represents the size of each field (column). FALSE if an error occurs |
|---|---|
| PHP Version: | 5+ |
Example - Procedural style
Return the length of the fields of the current row in the result-set:
<?php
$con = mysqli_connect("localhost","my_user","my_password","my_db");
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit();
}
$sql = "SELECT * FROM Persons ORDER BY Lastname";
if ($result = mysqli_query($con, $sql)) {
$row = mysqli_fetch_row($result);
// Display field lengths
foreach (mysqli_fetch_lengths($result) as $i => $val) {
printf("Field %2d has length: %2d\n", $i+1, $val);
}
mysqli_free_result($result);
}
mysqli_close($con);
?>
❮ PHP MySQLi Reference
