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);
?>

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