Dump Database -- Dumping a database to MDB2 XML
Dump Database
You can use dumpDatabase() to copy your database
to a schema file.
dumpDatabase() accepts a database definition
array, for instance:
<?php
require_once 'MDB2/Schema.php';
$options = array(
'log_line_break' => '<br>',
'idxname_format' => '%s',
'debug' => true,
'quote_identifier' => true,
'force_defaults' => false,
'portability' => false
);
$dsn = 'mysql://root:@localhost/MDB2Example';
$schema =& MDB2_Schema::factory($dsn, $options);
if (PEAR::isError($schema)) {
$error = $schema->getMessage();
} else {
$dump_options = array(
'output_mode' => 'file',
'output' => 'schema.xml',
'end_of_line' => "\n"
);
$definition = $schema->getDefinitionFromDatabase();
if (PEAR::isError($definition)) {
$error = $definition->getMessage();
} else {
$op = $schema->dumpDatabase($definition, $dump_options, MDB2_SCHEMA_DUMP_ALL);
if (PEAR::isError($op)) {
$error = $op->getMessage();
}
}
}
if (isset($error)) {
var_dump($error);
}
$schema->disconnect();
?>
|
The first parameter is just the database definition array. The second
parameter is the options where we choose to output to a file. The third
option tells dumpDatabase() what to be dumped -
either the structure, the data in the tables, or both. This is defined
using the constants MDB2_SCHEMA_DUMP_STRUCTURE,
MDB2_SCHEMA_DUMP_CONTENT and
MDB2_SCHEMA_DUMP_ALL.
Some databases don't accept a text field with a default value. Given that,
notice that $options['force_defaults'] has to be set to
false when you want to create a field with the type
text, as it is true by default.
