mysqli_num_fields

Manuale PHP
Indietro		Avanti

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.

Esempi

Esempio 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();
?>

Esempio 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);
?>

The above example will output:

Result set has 5 fields.

Indietro	Partenza	Avanti
mysqli_next_result	Risali	mysqli_num_rows

mysqli_num_fields

Description

Valori restituiti

Vedere anche:

Esempi