PHP mysqli_fetch_lengths function

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mysqli_fetch_lengths

(PHP 5)

mysqli_fetch_lengths

(no version information, might be only in CVS)

result->lengths() — Returns the lengths of the columns of the current row in the result setDescription

Procedural style:

array mysqli_fetch_lengths ( mysqli_result result )

Object oriented style (property):

class mysqli_result {

array lengths

}

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 1. Object oriented style

$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 2. Procedural style

$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 example 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

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Published:
2.26.07 / 12am
Category:
PHP Functions
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