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Returns the number of columns for the most recent query


maxdb_field_count

maxdb::field_count

(PECL maxdb >= 1.0)

maxdb_field_count -- maxdb::field_countReturns the number of columns for the most recent query

Description

Procedural style

int maxdb_field_count ( resource $link )

Object oriented style

int maxdb::field_count ( void )

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 maxdb_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.

Return Values

An integer representing the number of fields in a result set.

Examples

Example #1 Object oriented style

<?php
$maxdb 
= new maxdb("localhost""MONA""RED""DEMODB");

maxdb_report (MAXDB_REPORT_OFF);
$maxdb->query("DROP TABLE friends");
maxdb_report (MAXDB_REPORT_ERROR);

$maxdb->query"CREATE TABLE friends (id int, name varchar(20))");

$maxdb->query"INSERT INTO friends VALUES (1,'Hartmut')");
$maxdb->query"INSERT INTO friends VALUES (2, 'Ulf')");

if (
$maxdb->field_count()) {
   
/* this was a select/show or describe query */
   
$result $maxdb->store_result();

   
/* process resultset */
   
$row $result->fetch_row();

   
/* free resultset */
   
$result->close();
}

/* close connection */
$maxdb->close();
?>

Example #2 Procedural style

<?php
$link 
maxdb_connect("localhost""MONA""RED""DEMODB");

maxdb_report (MAXDB_REPORT_OFF);
maxdb_query($link,"DROP TABLE friends");
maxdb_report (MAXDB_REPORT_ERROR);

maxdb_query($link"CREATE TABLE friends (id int, name varchar(20))");

maxdb_query($link"INSERT INTO friends VALUES (1,'Hartmut')");
maxdb_query($link"INSERT INTO friends VALUES (2, 'Ulf')");

if (
maxdb_field_count($link)) {
   
/* this was a select/show or describe query */
   
$result maxdb_store_result($link);

   
/* process resultset */
   
$row maxdb_fetch_row($result);

   
/* free resultset */
   
maxdb_free_result($result);
}

/* close connection */
maxdb_close($link);
?>

The above example produces no output.



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