Returns the number of columns for the most recent query


(PECL mysqlnd-uh >= 1.0.0-alpha)

MysqlndUhConnection::getFieldCountReturns the number of columns for the most recent query

Описание

public int MysqlndUhConnection::getFieldCount ( mysqlnd_connection $connection )

Returns the number of columns for the most recent query.

Список параметров

connection

Mysqlnd connection handle. Do not modify!

Возвращаемые значения

Number of columns.

Примеры

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

Пример #1 MysqlndUhConnection::getFieldCount() example

<?php
class 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($rettrue));
   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);
?>

Результат выполнения данного примера:

 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) 

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