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PHP file operations, _PHP tutorial

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Release： 2016-07-12 08:51:15

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PHP文件操作，

　　一、fstat函数：显示文件的所有信息

<span>$file_path</span> = "test.php"<span>;
</span><span>if</span>(<span>$fp</span>=<span>fopen</span>(<span>$file_path</span>,"a+"<span>)){
    </span><span>$file_info</span>=<span>fstat</span>(<span>$fp</span><span>);
    </span><span>echo</span> "<pre class="brush:php;toolbar:false">"<span>;
    </span><span>print_r</span>(<span>$file_info</span><span>);
    </span><span>echo</span> "

"; echo "文件大小为".$file_info['size']; echo "文件上次访问时间".date("Y-m-d H:i:s",$file_info['mtime']); } fclose($fp); //一定要关闭

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　　二、文件读取：

<span>//</span><span>第一种：</span>
<span>$con</span> = <span>fread</span>(<span>$fp</span>,<span>filesize</span>(<span>$file_path</span><span>));
</span><span>$con</span> = <span>str_replace</span>("\r\n","<br>",<span>$con</span><span>);
</span><span>echo</span> "文件内容是".<span>$con</span><span>;

</span><span>//</span><span>第二种：将文件一下全部读取</span>
<span>$con</span> = <span>file_get_contents</span>(<span>$file_path</span><span>);
</span><span>$con</span> = <span>str_replace</span>("\r\n","<br>",<span>$con</span><span>);
</span><span>echo</span> "文件内容是".<span>$con</span><span>;

</span><span>//</span><span>第三种：一段一段读取</span>
<span>$buffer</span> = 1024<span>;  
</span><span>//</span><span>为了下载的安全，最好使用文件字节读取计数器</span>
<span>$file_count</span> = 0<span>;
</span><span>//</span><span>feof用于判断文件是否读取到文档尾</span>
<span>while</span>(!<span>feof</span>(<span>$fp</span>) && (<span>$file_size</span>-<span>$file_count</span>>0<span>)){
</span><span>$file_data</span> = <span>fread</span>(<span>$fp</span>,<span>$buffer</span><span>);
</span><span>//</span><span>统计读了多少个字节</span>
<span>$file_count</span>+<span>$buffer</span><span>;
</span><span>echo</span> <span>$file_data</span><span>;   
}</span>

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　　三、写入文件：

   <span>//</span><span>1、传统方法写入文件</span>
    <span>$file_path</span> = "test.txt"<span>;
    </span><span>if</span>(<span>file_exists</span>(<span>$file_path</span><span>)){
        </span><span>$fp</span> = <span>fopen</span>(<span>$file_path</span>,"a+"<span>);
        </span><span>//</span><span>打开方式：a+是追加内容。w+是覆盖原来的。</span>
        <span>$con</span> = "Hello!\r\n"<span>;
        </span><span>fwrite</span>(<span>$fp</span>,<span>$con</span><span>);
        </span><span>echo</span> "添加成功！"<span>;
    }</span><span>else</span><span>{
        </span><span>echo</span> "文件不存在"<span>;
    }
    </span><span>fclose</span>(<span>$fp</span><span>);

    </span><span>//</span><span>2、第二种方法写入文件</span>
    <span>$file_path</span>= "test.txt"<span>;
    </span><span>$con</span> = "北京你好！\r\n"<span>;
    </span><span>file_put_contents</span>(<span>$file_path</span>,<span>$con</span>,<span>FILE_APPEND);
    </span><span>echo</span>  "成功";

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　　四、文件操作的应用：

<span>//</span><span>可以操作ini文件。将服务器的配置写在ini文件中，再对其进行操作。</span>
    dbc.<span>ini
    host</span>=192.168.0.1<span>
    admin</span>=<span>admin
    password</span>=123456<span>    
demo</span>.<span>php
    </span><?<span>php
        </span><span>$con</span> = <span>parse_ini_file</span>("dbc.ini"<span>);
        </span><span>print_r</span>(<span>$con</span><span>);    
        </span>?>    
<span>//</span><span>将ini文件中的数据以数组形式读出，可以对其进行操作。</span>

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　　五、拷贝文件：

<span>if</span>(!<span>copy</span>("E:\\test.txt","D:\\1.txt"<span>)){
    </span><span>echo</span> "fail"<span>;
}</span><span>else</span><span>{
    </span><span>echo</span> "success"<span>;
}</span>

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　　六、创建文件

　　创建文件夹：

<span>//</span><span>$path = "E:\\happy";  //文件夹路径</span>
<span>$path</span> = "E:\\happy\aaa\bbb"; <span>//</span><span>多级文件夹</span>
<span>if</span>(!<span>is_dir</span>(<span>$path</span><span>)){
    </span><span>if</span>(<span>mkdir</span>(<span>$path</span>,0777,<span>true</span><span>)){
        </span><span>echo</span> "success"<span>;
    }</span><span>else</span><span>{
        </span><span>echo</span> "fail"<span>;
    }
}</span><span>else</span><span>{
    </span><span>echo</span> "文件夹已存在"<span>;
}</span>

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　　创建文件：

<span>$file_path</span> = "E:\\happy.txt"<span>;
</span><span>$fp</span> = <span>fopen</span>(<span>$file_path</span>,"w+"<span>);
</span><span>fwrite</span>(<span>$fp</span>,"hello"<span>);
</span><span>fclose</span>(<span>$fp</span>);

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　　七、删除文件：

　　删除文件夹：

<span>$path</span> = "E:\\happy\aaa\bbb"; <span>//</span><span>多级文件夹</span>
<span>if</span>(<span>rmdir</span>(<span>$path</span><span>)){
    </span><span>echo</span> "success"<span>;
}
</span><span>//</span><span>rmdir只能删除空文件夹，文件夹下有文件或目录均不能删除。</span>

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删除文件：

<span>$file_path</span> = "E:\\happy.txt"<span>;
</span><span>if</span>(<span>is_file</span>(<span>$file_path</span><span>)){
    </span><span>if</span>(<span>unlink</span>(<span>$file_path</span><span>)){
        </span><span>echo</span> "success"<span>;
    }</span><span>else</span><span>{
        </span><span>echo</span> "fail"<span>;
    }
}</span><span>else</span><span>{
    </span><span>echo</span> "文件不存在"<span>;
}</span>

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