c58f935fdc
The example (and related documentation at redis.io) was not updated for 5 years. Redis had no sorted sets and hashes when the original code was written (!). An update was really needed. We also use a modern PHP client now: Predis. A copy is shipped within this repository to make life easier to newcomers trying Redis for the first time via this example.
76 lines
1.8 KiB
PHP
76 lines
1.8 KiB
PHP
<?php
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/*
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* This file is part of the Predis package.
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*
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* (c) Daniele Alessandri <suppakilla@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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namespace Predis\Command;
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/**
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* Base class used to implement an higher level abstraction for "virtual"
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* commands based on EVAL.
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*
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* @link http://redis.io/commands/eval
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* @author Daniele Alessandri <suppakilla@gmail.com>
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*/
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abstract class ScriptedCommand extends ServerEvalSHA
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{
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/**
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* Gets the body of a Lua script.
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*
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* @return string
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*/
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abstract public function getScript();
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/**
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* Specifies the number of arguments that should be considered as keys.
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*
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* The default behaviour for the base class is to return 0 to indicate that
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* all the elements of the arguments array should be considered as keys, but
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* subclasses can enforce a static number of keys.
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*
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* @return int
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*/
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protected function getKeysCount()
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{
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return 0;
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}
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/**
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* Returns the elements from the arguments that are identified as keys.
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*
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* @return array
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*/
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public function getKeys()
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{
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return array_slice($this->getArguments(), 2, $this->getKeysCount());
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}
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/**
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* {@inheritdoc}
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*/
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protected function filterArguments(Array $arguments)
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{
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if (($numkeys = $this->getKeysCount()) && $numkeys < 0) {
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$numkeys = count($arguments) + $numkeys;
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}
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return array_merge(array(sha1($this->getScript()), (int) $numkeys), $arguments);
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}
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/**
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* @return array
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*/
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public function getEvalArguments()
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{
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$arguments = $this->getArguments();
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$arguments[0] = $this->getScript();
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return $arguments;
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}
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}
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