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mysql_fetch_lengths

(PHP 4, PHP 5)

mysql_fetch_lengthsGet the length of each output in a result

Warning

This extension is deprecated as of PHP 5.5.0, and will be removed in the future. Instead, the MySQLi or PDO_MySQL extension should be used. See also MySQL: choosing an API guide and related FAQ for more information. Alternatives to this function include:

Description

array mysql_fetch_lengths ( resource $result )

Returns an array that corresponds to the lengths of each field in the last row fetched by MySQL.

mysql_fetch_lengths() stores the lengths of each result column in the last row returned by mysql_fetch_row(), mysql_fetch_assoc(), mysql_fetch_array(), and mysql_fetch_object() in an array, starting at offset 0.

Parameters

result

The result resource that is being evaluated. This result comes from a call to mysql_query().

Return Values

An array of lengths on success or FALSE on failure.

Examples

Example #1 A mysql_fetch_lengths() example

<?php
$result 
mysql_query("SELECT id,email FROM people WHERE id = '42'");
if (!
$result) {
    echo 
'Could not run query: ' mysql_error();
    exit;
}
$row     mysql_fetch_assoc($result);
$lengths mysql_fetch_lengths($result);

print_r($row);
print_r($lengths);
?>

The above example will output something similar to:

Array
(
    [id] => 42
    [email] => user@example.com
)
Array
(
    [0] => 2
    [1] => 16
)

See Also

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User Contributed Notes 1 note

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-3
Bavo Janss
5 years ago
In case of UTF8 fields mysql_field_len() will return 3 times the maximum length (e.g. 30 for a VARCHAR(10) field)) for mysql_field_len() returns the byte length of the field not the defined size.
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