PHP Editor Review - Php Manual Function maxdb-affected-rows

Description

Procedural style:

int maxdb_affected_rows ( resource link )

Object oriented style (property):

class maxdb {

int affected_rows

}

maxdb_affected_rows() returns the number of rows affected by the last INSERT, UPDATE, or DELETE query associated with the provided link parameter. If this number cannot be determined, this function will return -1.

Note: For SELECT statements maxdb_affected_rows() works like maxdb_num_rows().

The maxdb_affected_rows() function only works with queries which modify a table. In order to return the number of rows from a SELECT query, use the maxdb_num_rows() function instead.

Example

Example 1. Object oriented style


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

/* check connection */
if (maxdb_connect_errno()) {
   printf("Connect failed: %s\n", maxdb_connect_error());
   exit();
}

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

/* Insert rows */
$maxdb->query("CREATE TABLE mycustomer AS SELECT * from hotel.customer");
printf("Affected rows (INSERT): %d\n", $maxdb->affected_rows);

$maxdb->query("ALTER TABLE mycustomer ADD Status int default 0");

/* update rows */
$maxdb->query("UPDATE mycustomer SET Status=1 WHERE cno > 50");
printf("Affected rows (UPDATE): %d\n", $maxdb->affected_rows);

/* delete rows */
$maxdb->query("DELETE FROM mycustomer WHERE cno < 50");
printf("Affected rows (DELETE): %d\n", $maxdb->affected_rows);

/* select all rows */
$result = $maxdb->query("SELECT title FROM mycustomer");
printf("Affected rows (SELECT): %d\n", $maxdb->affected_rows);

$result->close();

/* Delete table Language */
$maxdb->query("DROP TABLE mycustomer");

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

Example 2. Procedural style


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

if (!$link) {
   printf("Can't connect to localhost. Error: %s\n", maxdb_connect_error());
   exit();
}

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

/* Insert rows */
maxdb_query($link, "CREATE TABLE mycustomer AS SELECT * from hotel.customer");
printf("Affected rows (INSERT): %d\n", maxdb_affected_rows($link));

maxdb_query($link, "ALTER TABLE mycustomer ADD Status int default 0");

/* update rows */
maxdb_query($link, "UPDATE mycustomer SET Status=1 WHERE cno > 50");
printf("Affected rows (UPDATE): %d\n", maxdb_affected_rows($link));

/* delete rows */
maxdb_query($link, "DELETE FROM mycustomer WHERE cno < 50");
printf("Affected rows (DELETE): %d\n", maxdb_affected_rows($link));

/* select all rows */
$result = maxdb_query($link, "SELECT title FROM mycustomer");
printf("Affected rows (SELECT): %d\n", maxdb_affected_rows($link));

maxdb_free_result($result);

/* Delete table Language */
maxdb_query($link, "DROP TABLE mycustomer");

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

The above examples would produce the following output:

Affected rows (INSERT): 15
Affected rows (UPDATE): 15
Affected rows (DELETE): 0
Affected rows (SELECT): 15

maxdb_affected_rows

Description

Return Values

See also

Example