Php/docs/dba.example
Basic usage
Example #1 DBA example
<?php$id = dba_open("/tmp/test.db", "n", "db2");if (!$id) { echo "dba_open failed\n"; exit;}dba_replace("key", "This is an example!", $id);if (dba_exists("key", $id)) { echo dba_fetch("key", $id); dba_delete("key", $id);}dba_close($id);?>
DBA is binary safe and does not have any arbitrary limits. However, it inherits all limits set by the underlying database implementation.
All file-based databases must provide a way of setting the file mode of a new created database, if that is possible at all. The file mode is commonly passed as the fourth argument to dba_open() or dba_popen().
You can access all entries of a database in a linear way by using the dba_firstkey() and dba_nextkey() functions. You may not change the database while traversing it.
Example #2 Traversing a database
<?php// ...open database...$key = dba_firstkey($id);while ($key !== false) { if (true) { // remember the key to perform some action later $handle_later[] = $key; } $key = dba_nextkey($id);}foreach ($handle_later as $val) { dba_delete($val, $id);}?>
