Documentation Home
MySQL PHP API
Download this Manual
PDF (US Ltr) - 2.8Mb
PDF (A4) - 2.8Mb
EPUB - 456.8Kb
HTML Download (TGZ) - 396.0Kb
HTML Download (Zip) - 409.8Kb


MySQL PHP API  /  ...  /  MysqlndUhConnection::getFieldCount

9.7.11 MysqlndUhConnection::getFieldCount

Copyright 1997-2014 the PHP Documentation Group.

  • MysqlndUhConnection::getFieldCount

    Returns the number of columns for the most recent query

Description

public int MysqlndUhConnection::getFieldCount(mysqlnd_connection connection);

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 9.18 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($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
mysqli_field_count


User Comments
Sign Up Login You must be logged in to post a comment.