PHP. Руководство по PHP. 2005

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 set

Description

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 represented by the

result parameter. If successful, a numerically indexed array

representing the lengths of each column is returned or FALSE on failure.

Возвращаемые значения

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.

Примеры

Пример 1. 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(); ?>

Пример 2. 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); ?>

Результат выполнения данного примера:
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

Пред.
Начало
След.
mysqli_fetch_fields
Уровень выше
mysqli_fetch_object

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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