PHP Dokumentation: Function maxdb-field-count
12. Januar 2010 von werner
maxdb_field_count
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:
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
Beispiel #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();
?>Beispiel #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.