mysqli->field_count

mysqli_field_count

(PHP 5)

mysqli_field_count — Returns the number of columns for the most recent query

Description

Object oriented style (property):

mysqli_result

int$field_count;

Procedural style:

int mysqli_field_count ( mysqli $link )

Returns the number of columns for the most recent query on the connection represented by the link parameter. This function can be useful when using the mysqli_store_result() function to determine if the query should have produced a non-empty result set or not without knowing the nature of the query.

Parameters

link: Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()

Return Values

An integer representing the number of fields in a result set.

Examples

Example #1 Object oriented style


<?php

$mysqli = new mysqli("localhost", "my_user", "my_password", "test");



$mysqli->query( "DROP TABLE IF EXISTS friends");

$mysqli->query( "CREATE TABLE friends (id int, name varchar(20))");



$mysqli->query( "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')");





$mysqli->real_query($HTTP_POST_VARS['query']);



if ($mysqli->field_count) {

    /* this was a select/show or describe query */

    $result = $mysqli->store_result();



    /* process resultset */

    $row = $result->fetch_row();



    /* free resultset */

    $result->close();

}



/* close connection */

$mysqli->close();

?>

Example #2 Procedural style


<?php

$link = mysqli_connect("localhost", "my_user", "my_password", "test");



mysqli_query($link, "DROP TABLE IF EXISTS friends");

mysqli_query($link, "CREATE TABLE friends (id int, name varchar(20))");



mysqli_query($link, "INSERT INTO friends VALUES (1,'Hartmut'), (2, 'Ulf')");



mysqli_real_query($link, $HTTP_POST_VARS['query']);



if (mysqli_field_count($link)) {

    /* this was a select/show or describe query */

    $result = mysqli_store_result($link);



    /* process resultset */

    $row = mysqli_fetch_row($result);



    /* free resultset */

    mysqli_free_result($result);

}



/* close connection */

mysqli_close($link);

?>