索引自定义函数

目录自定义函数

PHP中并不提供查询目录大小、复制目录、删除有文件的目录的函数，我们需要自己编写

这个函数只要传递一个url，就能递归查询目录中的文件大小，从而统计出目录大小

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php</span><span style="color: #008080;"> 2</span>     <span style="color: #0000ff;">function</span> dirSize(<span style="color: #800080;">$dir</span><span style="color: #000000;">){</span><span style="color: #008080;"> 3</span>         <span style="color: #800080;">$dirsize</span> = 0<span style="color: #000000;">;</span><span style="color: #008080;"> 4</span>         <span style="color: #800080;">$url</span> = <span style="color: #008080;">opendir</span>(<span style="color: #800080;">$dir</span><span style="color: #000000;">);</span><span style="color: #008080;"> 5</span>         <span style="color: #0000ff;">while</span>(<span style="color: #800080;">$filename</span> = <span style="color: #008080;">readdir</span>(<span style="color: #800080;">$url</span><span style="color: #000000;">)){</span><span style="color: #008080;"> 6</span>             <span style="color: #800080;">$file</span> = <span style="color: #800080;">$dir</span>.'/'.<span style="color: #800080;">$filename</span><span style="color: #000000;">;</span><span style="color: #008080;"> 7</span>             <span style="color: #0000ff;">if</span>(!(<span style="color: #800080;">$filename</span>=='.' || <span style="color: #800080;">$filename</span>=='..'<span style="color: #000000;">)){</span><span style="color: #008080;"> 8</span>                 <span style="color: #0000ff;">if</span>(<span style="color: #008080;">is_dir</span>(<span style="color: #800080;">$file</span><span style="color: #000000;">)){</span><span style="color: #008080;"> 9</span>                     <span style="color: #800080;">$dirsize</span> += dirSize(<span style="color: #800080;">$file</span><span style="color: #000000;">);</span><span style="color: #008080;">10</span>                 }<span style="color: #0000ff;">else</span><span style="color: #000000;">{</span><span style="color: #008080;">11</span>                     <span style="color: #800080;">$dirsize</span> += <span style="color: #008080;">filesize</span>(<span style="color: #800080;">$file</span><span style="color: #000000;">);</span><span style="color: #008080;">12</span> <span style="color: #000000;">                }</span><span style="color: #008080;">13</span> <span style="color: #000000;">            }</span><span style="color: #008080;">14</span> <span style="color: #000000;">        }</span><span style="color: #008080;">15</span>         <span style="color: #008080;">closedir</span>(<span style="color: #800080;">$url</span><span style="color: #000000;">);</span><span style="color: #008080;">16</span>         <span style="color: #0000ff;">return</span> <span style="color: #800080;">$dirsize</span><span style="color: #000000;">;</span><span style="color: #008080;">17</span>     }

 

这个函数需要传递两个url，分别是旧目录和新目录，就能复制该目录及文件

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php</span><span style="color: #008080;"> 2</span>     <span style="color: #0000ff;">function</span> copyDir(<span style="color: #800080;">$dirSrc</span>,<span style="color: #800080;">$dirTo</span><span style="color: #000000;">){</span><span style="color: #008080;"> 3</span>         <span style="color: #0000ff;">if</span>(<span style="color: #008080;">is_file</span>(<span style="color: #800080;">$dirTo</span><span style="color: #000000;">))</span><span style="color: #008080;"> 4</span> <span style="color: #000000;">        {</span><span style="color: #008080;"> 5</span>             <span style="color: #0000ff;">echo</span> '目标不是目录不能创建！'<span style="color: #000000;">;</span><span style="color: #008080;"> 6</span>             <span style="color: #0000ff;">return</span><span style="color: #000000;">;</span><span style="color: #008080;"> 7</span> <span style="color: #000000;">        }</span><span style="color: #008080;"> 8</span>         <span style="color: #0000ff;">if</span>(!<span style="color: #008080;">file_exists</span>(<span style="color: #800080;">$dirTo</span><span style="color: #000000;">))</span><span style="color: #008080;"> 9</span> <span style="color: #000000;">        {</span><span style="color: #008080;">10</span>             <span style="color: #008080;">mkdir</span>(<span style="color: #800080;">$dirTo</span><span style="color: #000000;">);</span><span style="color: #008080;">11</span> <span style="color: #000000;">        }</span><span style="color: #008080;">12</span>         <span style="color: #800080;">$dir_handle</span> = @<span style="color: #008080;">opendir</span>(<span style="color: #800080;">$dirSrc</span><span style="color: #000000;">);</span><span style="color: #008080;">13</span>         <span style="color: #0000ff;">if</span>(<span style="color: #800080;">$dir_handle</span><span style="color: #000000;">)</span><span style="color: #008080;">14</span> <span style="color: #000000;">        {</span><span style="color: #008080;">15</span>             <span style="color: #0000ff;">while</span>(<span style="color: #800080;">$filename</span> = <span style="color: #008080;">readdir</span>(<span style="color: #800080;">$dir_handle</span><span style="color: #000000;">))</span><span style="color: #008080;">16</span> <span style="color: #000000;">            {</span><span style="color: #008080;">17</span>                 <span style="color: #0000ff;">if</span>(<span style="color: #800080;">$filename</span>!="." && <span style="color: #800080;">$filename</span>!=".."<span style="color: #000000;">)</span><span style="color: #008080;">18</span> <span style="color: #000000;">                {</span><span style="color: #008080;">19</span>                     <span style="color: #800080;">$subSrcFile</span> = <span style="color: #800080;">$dirSrc</span> . "\\".<span style="color: #800080;">$filename</span><span style="color: #000000;">;</span><span style="color: #008080;">20</span>                     <span style="color: #800080;">$subToFile</span> = <span style="color: #800080;">$dirTo</span> . "\\".<span style="color: #800080;">$filename</span><span style="color: #000000;">;</span><span style="color: #008080;">21</span>                      <span style="color: #008080;">22</span>                      <span style="color: #0000ff;">if</span>(<span style="color: #008080;">is_dir</span>(<span style="color: #800080;">$subSrcFile</span><span style="color: #000000;">))</span><span style="color: #008080;">23</span> <span style="color: #000000;">                     {</span><span style="color: #008080;">24</span>                          copyDir(<span style="color: #800080;">$subSrcFile</span>, <span style="color: #800080;">$subToFile</span><span style="color: #000000;">);</span><span style="color: #008080;">25</span> <span style="color: #000000;">                     }</span><span style="color: #008080;">26</span>                      <span style="color: #0000ff;">if</span>(<span style="color: #008080;">is_file</span>(<span style="color: #800080;">$subSrcFile</span><span style="color: #000000;">))</span><span style="color: #008080;">27</span> <span style="color: #000000;">                     {</span><span style="color: #008080;">28</span>                           <span style="color: #008080;">copy</span>(<span style="color: #800080;">$subSrcFile</span>, <span style="color: #800080;">$subToFile</span><span style="color: #000000;">);</span><span style="color: #008080;">29</span> <span style="color: #000000;">                     }</span><span style="color: #008080;">30</span> <span style="color: #000000;">                }</span><span style="color: #008080;">31</span> <span style="color: #000000;">            }</span><span style="color: #008080;">32</span>             <span style="color: #008080;">closedir</span>(<span style="color: #800080;">$dir_handle</span><span style="color: #000000;">);</span><span style="color: #008080;">33</span> <span style="color: #000000;">        }</span><span style="color: #008080;">34</span>     }

这个函数只要传递一个url，就能递归删除目录及子目录的文件，从而删除目录

<span style="color: #008080;"> 1</span> <span style="color: #000000;">php</span><span style="color: #008080;"> 2</span> <span style="color: #0000ff;">function</span> rmDirAll(<span style="color: #800080;">$url</span><span style="color: #000000;">){</span><span style="color: #008080;"> 3</span>     <span style="color: #008000;">//</span><span style="color: #008000;">检测要打开目录是否存在</span><span style="color: #008080;"> 4</span>     <span style="color: #0000ff;">if</span>(!<span style="color: #800080;">$dir</span>=@<span style="color: #008080;">opendir</span>(<span style="color: #800080;">$url</span><span style="color: #000000;">)){</span><span style="color: #008080;"> 5</span>         <span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;</span><span style="color: #008080;"> 6</span> <span style="color: #000000;">    }</span><span style="color: #008080;"> 7</span>     <span style="color: #0000ff;">while</span>(<span style="color: #0000ff;">false</span> !==(<span style="color: #800080;">$file</span>=<span style="color: #008080;">readdir</span>(<span style="color: #800080;">$dir</span><span style="color: #000000;">))){</span><span style="color: #008080;"> 8</span>     <span style="color: #008000;">//</span><span style="color: #008000;">排除当前目录与父级目录</span><span style="color: #008080;"> 9</span>         <span style="color: #0000ff;">if</span>(<span style="color: #800080;">$file</span>!=="."&&<span style="color: #800080;">$file</span>!==".."<span style="color: #000000;">){</span><span style="color: #008080;">10</span>             <span style="color: #800080;">$file</span>=<span style="color: #800080;">$url</span> .'/'. <span style="color: #800080;">$file</span><span style="color: #000000;">;</span><span style="color: #008080;">11</span>             <span style="color: #008000;">//</span><span style="color: #008000;">递归删除目录</span><span style="color: #008080;">12</span>             <span style="color: #0000ff;">if</span>(<span style="color: #008080;">is_dir</span>(<span style="color: #800080;">$file</span><span style="color: #000000;">)){</span><span style="color: #008080;">13</span>                 rmDirAll(<span style="color: #800080;">$file</span><span style="color: #000000;">);</span><span style="color: #008080;">14</span>             }<span style="color: #0000ff;">else</span><span style="color: #000000;">{</span><span style="color: #008080;">15</span>                 <span style="color: #0000ff;">if</span>(@<span style="color: #008080;">unlink</span>(<span style="color: #800080;">$file</span><span style="color: #000000;">)){</span><span style="color: #008080;">16</span>                     <span style="color: #0000ff;">continue</span><span style="color: #000000;">;</span><span style="color: #008080;">17</span>                 }<span style="color: #0000ff;">else</span><span style="color: #000000;">{</span><span style="color: #008080;">18</span>                     <span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;</span><span style="color: #008080;">19</span> <span style="color: #000000;">                }</span><span style="color: #008080;">20</span> <span style="color: #000000;">            }</span><span style="color: #008080;">21</span> <span style="color: #000000;">        }</span><span style="color: #008080;">22</span>         <span style="color: #0000ff;">if</span>(@<span style="color: #008080;">rmdir</span>(<span style="color: #800080;">$url</span><span style="color: #000000;">)){</span><span style="color: #008080;">23</span>            <span style="color: #0000ff;">return</span> <span style="color: #0000ff;">true</span><span style="color: #000000;">;</span><span style="color: #008080;">24</span>         }<span style="color: #0000ff;">else</span><span style="color: #000000;">{</span><span style="color: #008080;">25</span>            <span style="color: #0000ff;">return</span> <span style="color: #0000ff;">false</span><span style="color: #000000;">;</span><span style="color: #008080;">26</span> <span style="color: #000000;">        }</span><span style="color: #008080;">27</span> <span style="color: #000000;">    }</span><span style="color: #008080;">28</span> }