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  • PHP interface(接口)的示例代码

    <?php
    class DocumentStore
    {
        protected $data = [];
        
        public function addDocument(Documentable $document)
        {
            $key = $document->getId();
            $value = $document->getContent();
            $this->data[$key] = $value;
        }
        
        public function getDocuments()
        {
            return $this->data;
        }
        
        
    }
    
    interface Documentable
    {
        public function getId();
        
        public function getContent();
    }
    
    class HtmlDocument implements Documentable
    {
        protected $url;
        
        public function __construct($url)
        {
            $this->url = $url;
        }
        
        public function getId()
        {
            return $this->url;
        }
        
        public function getContent()
        {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $this->url);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 3);
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
            curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
            $html = curl_exec($ch);
            curl_close($ch);
            
            return $html;
        }
    }
    
    class StreamDocument implements Documentable
    {
        protected $resource;
        protected $buffer;
        
        public function __construct($resource, $buffer = 4096)
        {
            $this->resource = $resource;
            $this->buffer = $buffer;
        }
        
        public function getId()
        {
            return 'resource-' . (int)$this->resource;
        }
        
        public function getContent()
        {
            $streamContent = '';
            rewind($this->resource);
            while (feof($this->resource) === false){
                $streamContent .= fread($this->resource, $this->buffer);
            }
            
            return $streamContent;
        }
    }
    
    class CommandOutputDocument implements Documentable
    {
        protected $command;
        
        public function __construct($command)
        {
            $this->command = $command;
        }
        
        public function getId()
        {
            return $this->command;
        }
        
        public function getContent()
        {
            return shell_exec($this->command);
        }
    }
    
    
    $documentStore = new DocumentStore();
    
    //添加HTML文档
    $htmlDoc = new HtmlDocument('https://php.net');
    $documentStore->addDocument($htmlDoc);
    
    //添加流文档
    $streamDoc = new StreamDocument(fopen('stream.txt', 'rb'));
    $documentStore->addDocument($streamDoc);
    
    //添加终端命令文档
    $cmdDoc = new CommandOutputDocument('cat /etc/hosts');
    $documentStore->addDocument($cmdDoc);
    
    print_r($documentStore->getDocuments());
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  • 原文地址:https://www.cnblogs.com/yangcclg/p/6105367.html
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