(PHP 5, PHP 7)
Returns the number of columns for the most recent query
int mysqli_field_count ( mysqli $link )
Object oriented style
int $mysqli->field_count;
Procedural style
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()
Returns:
An integer representing the number of fields in a result set.
Examples:
$mysqli->field_count example
Object oriented style
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | <?php$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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | <?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);?> |
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