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Reader.php
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Reader.php
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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*/
namespace Cdb;
/**
* Read data from a CDB file.
* Native C and pure PHP implementations are provided.
*
* @see http://cr.yp.to/cdb.html
*/
abstract class Reader {
/**
* Open a file and return a subclass instance
*
* @param string $fileName
* @return Reader
*/
public static function open( $fileName ): Reader {
return self::haveExtension() ?
new Reader\DBA( $fileName ) :
new Reader\PHP( $fileName );
}
/**
* Returns true if the native extension is available
*
* @return bool
* @codeCoverageIgnore
*/
public static function haveExtension(): bool {
if ( !function_exists( 'dba_handlers' ) ) {
return false;
}
$handlers = dba_handlers();
return in_array( 'cdb', $handlers ) && in_array( 'cdb_make', $handlers );
}
/**
* Close the file. Optional, you can just let the variable go out of scope.
*/
abstract public function close(): void;
/**
* Get a value with a given key. Only string values are supported.
*
* @param string|int $key
* @return string|false
*/
abstract public function get( $key );
/**
* Check whether key exists
*
* @param string $key
* @return bool
*/
abstract public function exists( $key ): bool;
/**
* Fetch first key
*
* @return string|false
*/
abstract public function firstkey();
/**
* Fetch next key
*
* @return string|false
*/
abstract public function nextkey();
}

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text/x-php
Expires
Aug 19 2026, 17:24 (4 w, 6 d ago)
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local-disk
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5b/4c/703627b2311e0794c716a2987afb
Default Alt Text
Reader.php (2 KB)

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