PHP file and directory operations

This article mainly introduces PHP file and directory operations, involving PHP's operation skills related to file and directory traversal, judgment and sorting. There are more detailed instructions in the comments. Friends in need can refer to it

The examples in this article describe PHP file and directory operations. Share it with everyone for your reference, the details are as follows:

File directory related functions

<?php
// 输出目录中的文件
function outputcurfiles ($allowedtypes, $thedir){
//首先，我们确保目录存在。
if (is_dir ($thedir)){
 //现在，我们使用scandir扫描目录中的文件。
 $scanarray = scandir ($thedir);
 //接着我们开始解析数组。
 //scandir()用“.”和“..”统计文件导航列表
 //因此作为文件，我们不应该列出他们。
 for ($i = 0; $i < count ($scanarray); $i++){
  if ($scanarray[$i] != "." && $scanarray[$i] != ".."){
   //现在，进行检查，以确保这是一个文件，而不是一个目录。
   if (is_file ($thedir . "/" . $scanarray[$i])){
    //现在，因为我们将允许客户端编辑这个文件,
    //我们必须检查它是否是可读和可写。
    if (is_writable ($thedir. "/" . $scanarray[$i]) &&  is_readable($thedir . "/" . $scanarray[$i])){
     //现在，我们检查文件类型是否存在于允许的类型数组中.
     $thepath = pathinfo ($thedir . "/" . $scanarray[$i]);
     if (in_array ($thepath[&#39;extension&#39;], $allowedtypes)){
      //如果文件符合规定，我们可以继续输出.
      echo $scanarray[$i] . "<br />";
     }
    }
   }
  }
 }
} else {
 echo "对不起，这个目录不存在.";
}
}
$allowedtypes = array ("txt","html");
outputcurfiles ($allowedtypes, "testfolder");
///////////////////////////////////////////////////
function recurdir ($thedir) {
  //First attempt to open the directory.
  try {
    if ($adir = opendir ($thedir)){
      //扫描目录。
      while (false !== ($anitem = readdir ($adir))){
        //不统计目录中包含“.”或“..”的情况
        if ($anitem != "." && $anitem != ".."){
          //此时如果是一个目录，则缩进一点
          //再去递归
          if (is_dir ($thedir . "/" . $anitem)){
            ?><span style="font-weight: bold;" mce_style="font-weight: bold;"><?php echo $anitem; ?></span><?php
            ?><p style="margin-left: 10px;" mce_style="margin-left:10px;"><?php
            recurdir ($thedir . "/" . $anitem );
            ?></p><?php
          } elseif (is_file ($thedir . "/" . $anitem)){
            //此时输出文件.
            echo $anitem . "<br />";
          }
        }
      }
    } else {
      throw new exception ("Sorry, directory could not be openend.");
    }
  } catch (exception $e) {
    echo $e->getmessage();
  }
}
echo "<br />/////////////////////////////////////<br /><br />";
recurdir("testfolder");
//////////////////////////////////////////////////////////////////
echo "<br />/////////////////////////////////////<br /><br />";
function sortfilesbydate ($thedir){
  //首先，需要确保目录存在。
  if (is_dir ($thedir)){
    //接着，我们使用scandir扫描此目录中的文件.
    $scanarray = scandir ($thedir);
    $finalarray = array();
    //然后开始解析数组
    //scandir()用“.”和“..”统计文件导航列表
    //因此作为文件，我们不应该列出他们.
    for ($i = 0; $i < count ($scanarray); $i++){
      if ($scanarray[$i] != "." && $scanarray[$i] != ".."){
        //现在，我们检查，以确保这是一个文件，而不是一个目录.
        if (is_file ($thedir . "/" . $scanarray[$i])){
          //现在需要做的是循环数据到一个关联数组.
          $finalarray[$thedir . "/" . $scanarray[$i]] = filemtime ($thedir . "/" . $scanarray[$i]);
        }
      }
    }
    //至此，我们已经遍历了整个数组，现在需要做的只是asort()它。
    asort ($finalarray);
    return ($finalarray);
  } else {
    echo "对不起，这个目录不存在.";
  }
}
//然后，我们将函数指向我们需要查看的目录.
$sortedarray = sortfilesbydate ("testfolder");
//至此，就可以按照如下形式输出:
while ($element = each ($sortedarray)){
  echo "File: " . $element[&#39;key&#39;] . " was last modified: " . date ("F j, Y h:i:s", $element[&#39;value&#39;]) . "<br />";
}
?>

The above is the entire article Content, I hope it will be helpful to everyone’s study.

Related recommendations:

phpFile directoryOperation development process and example sharing

php tutorial on how to traverse file directories

##php chmod() function and batch modification of file directories Permissions

The above is the detailed content of PHP file and directory operations. For more information, please follow other related articles on the PHP Chinese website!