PHP. Руководство по PHP. 2005

mysqli_num_fields

Пред.

След.

mysqli_num_fields

(PHP 5)mysqli_num_fields

(no version information, might be only in CVS)result->field_count --

Get the number of fields in a result

Description

Procedural style:int mysqli_num_fields (mysqli_result result)

Object oriented style (property):class mysqli_result {

int field_count

}

mysqli_num_fields() returns the number of fields from specified result set.

Возвращаемые значения

The number of fields from a result set

Смотрите также

mysqli_fetch_field().

Примеры

Пример 1. Object oriented style
<?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()){ printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } if ($result = $mysqli->query("SELECT * FROM City ORDER BY ID LIMIT 1")){ /* determine number of fields in result set */ $field_cnt = $result->field_count; printf("Result set has %d fields.\n", $field_cnt); /* close result set */ $result->close(); } /* close connection */ $mysqli->close(); ?>

Пример 2. Procedural style
<?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()){ printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } if ($result = mysqli_query($link, "SELECT * FROM City ORDER BY ID LIMIT 1")){ /* determine number of fields in result set */ $field_cnt = mysqli_num_fields($result); printf("Result set has %d fields.\n", $field_cnt); /* close result set */ mysqli_free_result($result); } /* close connection */ mysqli_close($link); ?>

Результат выполнения данного примера:
Result set has 5 fields.

Пред.
Начало
След.
mysqli_next_result
Уровень выше
mysqli_num_rows

Отвечу на любые вопросы. С уважением, Дмитрий Владимирович.

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