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maxdb_field_count
(PECL maxdb >= 1.0)
maxdb_field_count -- maxdb->field_count — Returns the number of columns for the most recent query
Beschreibung
Procedural style:
int maxdb_field_count
( resource $link
)
Object oriented style (method):
maxdb
int
field_count
( void
)
Returns the number of columns for the most recent query on the connection represented by the link parameter. This function can be useful when using the maxdb_store_result() function to determine if the query should have produced a non-empty result set or not without knowing the nature of the query.
Rückgabewerte
An integer representing the number of fields in a result set.
Beispiele
PHP Code
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$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 */
$maxdb->close();
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$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.