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# maxdb_rollback

(no version information, might be only in CVS)

maxdb_rollback

(no version information, might be only in CVS)

maxdb->rollback -- Rolls back current transaction

## Description

bool maxdb_rollback ( resource link )
class maxdb {
bool rollback ( void )
}

Rollbacks the current transaction for the database specified by the link parameter.

## Return values

Gibt bei Erfolg `TRUE` zurück, im Fehlerfall `FALSE`.

## See also

maxdb_commit() maxdb_autocommit()

## Example

Beispiel 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(); } /* disable autocommit */ $maxdb->autocommit(FALSE); $maxdb->query("CREATE TABLE temp.mycity LIKE hotel.city"); $maxdb->query("INSERT INTO temp.mycity SELECT * FROM hotel.city"); /* commit insert */ $maxdb->commit(); /* delete all rows */ $maxdb->query("DELETE FROM temp.mycity"); if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")) { $row = $result->fetch_row(); printf("%d rows in table mycity.\n", $row[0]); /* Free result */ $result->close(); } /* Rollback */ $maxdb->rollback(); if ($result = $maxdb->query("SELECT COUNT(*) FROM temp.mycity")) { $row = $result->fetch_row(); printf("%d rows in table mycity (after rollback).\n", $row[0]); /* Free result */ $result->close(); } /* Drop table myCity */ $maxdb->query("DROP TABLE temp.mycity"); $maxdb->close(); ?>`

Beispiel 2. Procedural style
`<?php $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB"); /* check connection */ if (maxdb_connect_errno()) { printf("Connect failed: %s\n", maxdb_connect_error()); exit(); } /* disable autocommit */ maxdb_autocommit($link, FALSE); maxdb_query($link, "CREATE TABLE temp.mycity LIKE hotel.city"); maxdb_query($link, "INSERT INTO temp.mycity SELECT * FROM hotel.city"); /* commit insert */ maxdb_commit($link); /* delete all rows */ maxdb_query($link, "DELETE FROM temp.mycity"); if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")) { $row = maxdb_fetch_row($result); printf("%d rows in table mycity.\n", $row[0]); /* Free result */ maxdb_free_result($result); } /* Rollback */ maxdb_rollback($link); if ($result = maxdb_query($link, "SELECT COUNT(*) FROM temp.mycity")) { $row = maxdb_fetch_row($result); printf("%d rows in table mycity (after rollback).\n", $row[0]); /* Free result */ maxdb_free_result($result); } /* Drop table myCity */ maxdb_query($link, "DROP TABLE temp.mycity"); maxdb_close($link); ?>`

The above examples would produce the following output:

    0 rows in table mycity.
    25 rows in table mycity (after rollback).

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