MySQL and PHP
Copyright 1997-2021 the PHP Documentation Group.
mysqli::$field_count
mysqli_field_count
Returns the number of columns for the most recent query
Object oriented style
int mysqli->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.
link
Procedural style only: A link identifier returned by
mysqli_connect
or
mysqli_init
An integer representing the number of fields in a result set.
Example 3.44 $mysqli->field_count
example
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')"); $mysqli->real_query("SELECT * FROM friends"); if ($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(); ?>
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($link, "SELECT * FROM friends"); if (mysqli_field_count($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); ?>