Php/docs/mysqlnduhconnection.getfieldcount

• PHP Manual
• MysqlndUhConnection
• Returns the number of columns for the most recent query

MysqlndUhConnection::getFieldCount

(PECL mysqlnd-uh >= 1.0.0-alpha)

MysqlndUhConnection::getFieldCount — Returns the number of columns for the most recent query

Description

public MysqlndUhConnection::getFieldCount ( mysqlnd_connection $connection ) : int

Returns the number of columns for the most recent query.

Parameters

connection

Mysqlnd connection handle. Do not modify!

Return Values

Number of columns.

Examples

MysqlndUhConnection::getFieldCount() is not only executed after the invocation of a user space API call which maps directly to it but also called internally.

Example #1 MysqlndUhConnection::getFieldCount() example

<?phpclass proxy extends MysqlndUhConnection { public function getFieldCount($res) {   printf("%s(%s)\n", __METHOD__, var_export(func_get_args(), true));   $ret = parent::getFieldCount($res);   printf("%s returns %s\n", __METHOD__, var_export($ret, true));   return $ret; }}mysqlnd_uh_set_connection_proxy(new proxy());$mysqli = new mysqli("localhost", "root", "", "test");$mysqli->query("WILL_I_EVER_LEARN_SQL?");var_dump($mysqli->field_count);$mysqli->query("SELECT 1, 2, 3 FROM DUAL");var_dump($mysqli->field_count);?>

The above example will output:

proxy::getFieldCount(array (
  0 => NULL,
))
proxy::getFieldCount returns 0
int(0)
proxy::getFieldCount(array (
  0 => NULL,
))
proxy::getFieldCount returns 3
proxy::getFieldCount(array (
  0 => NULL,
))
proxy::getFieldCount returns 3
int(3)

See Also

• mysqlnd_uh_set_connection_proxy() - Installs a proxy for mysqlnd connections
• mysqli_field_count() - Returns the number of columns for the most recent query