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> 1</span> <span>php </span><span> 2</span> <span>function</span> dirSize(<span>$dir</span><span>){ </span><span> 3</span> <span>$dirsize</span> = 0<span>; </span><span> 4</span> <span>$url</span> = <span>opendir</span>(<span>$dir</span><span>); </span><span> 5</span> <span>while</span>(<span>$filename</span> = <span>readdir</span>(<span>$url</span><span>)){ </span><span> 6</span> <span>$file</span> = <span>$dir</span>.'/'.<span>$filename</span><span>; </span><span> 7</span> <span>if</span>(!(<span>$filename</span>=='.' || <span>$filename</span>=='..'<span>)){ </span><span> 8</span> <span>if</span>(<span>is_dir</span>(<span>$file</span><span>)){ </span><span> 9</span> <span>$dirsize</span> += dirSize(<span>$file</span><span>); </span><span>10</span> }<span>else</span><span>{ </span><span>11</span> <span>$dirsize</span> += <span>filesize</span>(<span>$file</span><span>); </span><span>12</span> <span> } </span><span>13</span> <span> } </span><span>14</span> <span> } </span><span>15</span> <span>closedir</span>(<span>$url</span><span>); </span><span>16</span> <span>return</span> <span>$dirsize</span><span>; </span><span>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> 1</span> <span>php </span><span> 2</span> <span>function</span> copyDir(<span>$dirSrc</span>,<span>$dirTo</span><span>){ </span><span> 3</span> <span>if</span>(<span>is_file</span>(<span>$dirTo</span><span>)) </span><span> 4</span> <span> { </span><span> 5</span> <span>echo</span> '目标不是目录不能创建!'<span>; </span><span> 6</span> <span>return</span><span>; </span><span> 7</span> <span> } </span><span> 8</span> <span>if</span>(!<span>file_exists</span>(<span>$dirTo</span><span>)) </span><span> 9</span> <span> { </span><span>10</span> <span>mkdir</span>(<span>$dirTo</span><span>); </span><span>11</span> <span> } </span><span>12</span> <span>$dir_handle</span> = @<span>opendir</span>(<span>$dirSrc</span><span>); </span><span>13</span> <span>if</span>(<span>$dir_handle</span><span>) </span><span>14</span> <span> { </span><span>15</span> <span>while</span>(<span>$filename</span> = <span>readdir</span>(<span>$dir_handle</span><span>)) </span><span>16</span> <span> { </span><span>17</span> <span>if</span>(<span>$filename</span>!="." && <span>$filename</span>!=".."<span>) </span><span>18</span> <span> { </span><span>19</span> <span>$subSrcFile</span> = <span>$dirSrc</span> . "\\".<span>$filename</span><span>; </span><span>20</span> <span>$subToFile</span> = <span>$dirTo</span> . "\\".<span>$filename</span><span>; </span><span>21</span> <span>22</span> <span>if</span>(<span>is_dir</span>(<span>$subSrcFile</span><span>)) </span><span>23</span> <span> { </span><span>24</span> copyDir(<span>$subSrcFile</span>, <span>$subToFile</span><span>); </span><span>25</span> <span> } </span><span>26</span> <span>if</span>(<span>is_file</span>(<span>$subSrcFile</span><span>)) </span><span>27</span> <span> { </span><span>28</span> <span>copy</span>(<span>$subSrcFile</span>, <span>$subToFile</span><span>); </span><span>29</span> <span> } </span><span>30</span> <span> } </span><span>31</span> <span> } </span><span>32</span> <span>closedir</span>(<span>$dir_handle</span><span>); </span><span>33</span> <span> } </span><span>34</span> }
这个函数只要传递一个url,就能递归删除目录及子目录的文件,从而删除目录
<span> 1</span> <span>php </span><span> 2</span> <span>function</span> rmDirAll(<span>$url</span><span>){ </span><span> 3</span> <span>//</span><span>检测要打开目录是否存在</span> <span> 4</span> <span>if</span>(!<span>$dir</span>=@<span>opendir</span>(<span>$url</span><span>)){ </span><span> 5</span> <span>return</span> <span>false</span><span>; </span><span> 6</span> <span> } </span><span> 7</span> <span>while</span>(<span>false</span> !==(<span>$file</span>=<span>readdir</span>(<span>$dir</span><span>))){ </span><span> 8</span> <span>//</span><span>排除当前目录与父级目录</span> <span> 9</span> <span>if</span>(<span>$file</span>!=="."&&<span>$file</span>!==".."<span>){ </span><span>10</span> <span>$file</span>=<span>$url</span> .'/'. <span>$file</span><span>; </span><span>11</span> <span>//</span><span>递归删除目录</span> <span>12</span> <span>if</span>(<span>is_dir</span>(<span>$file</span><span>)){ </span><span>13</span> rmDirAll(<span>$file</span><span>); </span><span>14</span> }<span>else</span><span>{ </span><span>15</span> <span>if</span>(@<span>unlink</span>(<span>$file</span><span>)){ </span><span>16</span> <span>continue</span><span>; </span><span>17</span> }<span>else</span><span>{ </span><span>18</span> <span>return</span> <span>false</span><span>; </span><span>19</span> <span> } </span><span>20</span> <span> } </span><span>21</span> <span> } </span><span>22</span> <span>if</span>(@<span>rmdir</span>(<span>$url</span><span>)){ </span><span>23</span> <span>return</span> <span>true</span><span>; </span><span>24</span> }<span>else</span><span>{ </span><span>25</span> <span>return</span> <span>false</span><span>; </span><span>26</span> <span> } </span><span>27</span> <span> } </span><span>28</span> }
以上就介绍了目录自定义函数,包括了方面的内容,希望对PHP教程有兴趣的朋友有所帮助。

PHP仍然流行的原因是其易用性、灵活性和强大的生态系统。1)易用性和简单语法使其成为初学者的首选。2)与web开发紧密结合,处理HTTP请求和数据库交互出色。3)庞大的生态系统提供了丰富的工具和库。4)活跃的社区和开源性质使其适应新需求和技术趋势。

PHP和Python都是高层次的编程语言,广泛应用于Web开发、数据处理和自动化任务。1.PHP常用于构建动态网站和内容管理系统,而Python常用于构建Web框架和数据科学。2.PHP使用echo输出内容,Python使用print。3.两者都支持面向对象编程,但语法和关键字不同。4.PHP支持弱类型转换,Python则更严格。5.PHP性能优化包括使用OPcache和异步编程,Python则使用cProfile和异步编程。

PHP主要是过程式编程,但也支持面向对象编程(OOP);Python支持多种范式,包括OOP、函数式和过程式编程。PHP适合web开发,Python适用于多种应用,如数据分析和机器学习。

PHP起源于1994年,由RasmusLerdorf开发,最初用于跟踪网站访问者,逐渐演变为服务器端脚本语言,广泛应用于网页开发。Python由GuidovanRossum于1980年代末开发,1991年首次发布,强调代码可读性和简洁性,适用于科学计算、数据分析等领域。

PHP适合网页开发和快速原型开发,Python适用于数据科学和机器学习。1.PHP用于动态网页开发,语法简单,适合快速开发。2.Python语法简洁,适用于多领域,库生态系统强大。

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PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

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