Current File : /www/varak.net/wiki.varak.net/vendor/wikimedia/cdb/src/Reader/Hash.php
<?php
namespace Cdb\Reader;
use Cdb\Reader;
use Wikimedia\Assert\Assert;
/**
* Hash implements the CdbReader interface based on an associative
* PHP array (a.k.a "hash").
*
* 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
*
* @file
*/
/**
* Hash implements the CdbReader interface based on an associative
* PHP array (a.k.a "hash").
*/
class Hash extends Reader {
/**
* @var string
*/
private $data;
/**
* A queue of keys to return from nextkey(),
* initialized by firstkey();
*
* @var string[]|null
*/
private $keys = null;
/**
* Create the object and open the file
*
* @param string[] $data An associative PHP array.
*/
public function __construct( $data ) {
if ( !is_array( $data ) ) {
throw new \InvalidArgumentException( __METHOD__ . ': "$data" must be an array.' );
}
$this->data = $data;
}
/**
* Close the file. Optional, you can just let the variable go out of scope.
*/
public function close() {
$this->data = array();
$this->keys = null;
}
/**
* Get a value with a given key. Only string values are supported.
*
* @param string $key
*
* @return bool|string The value associated with $key, or false if $key is not known.
*/
public function get( $key ) {
return isset( $this->data[ $key ] ) ? $this->data[ $key ] : false;
}
/**
* Check whether key exists
*
* @param string $key
*
* @return bool
*/
public function exists( $key ) {
return isset( $this->data[ $key ] );
}
/**
* Fetch first key
*
* @return string
*/
public function firstkey() {
$this->keys = array_keys( $this->data );
return $this->nextkey();
}
/**
* Fetch next key
*
* @return string
*/
public function nextkey() {
if ( $this->keys === null ) {
return $this->firstkey();
}
return empty( $this->keys ) ? false : array_shift( $this->keys );
}
}
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