mysqli_result::$field_count, mysqli_num_fields

• mysqli_result::$field_count

  mysqli_num_fields

  Get the number of fields in a result

Description

Object oriented styleint mysqli_result->field_count ;

Procedural styleint mysqli_num_fields(mysqli_result result);

Returns the number of fields from specified result set.

Parameters

result

Procedural style only: A result set identifier returned by mysqli_query, mysqli_store_result or mysqli_use_result.

Return Values

The number of fields from a result set.

Examples

Example 20.194. 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();
?>

Example 20.195. 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);
?>

The above examples will output:

Result set has 5 fields.

See Also

mysqli_fetch_field

Retornar