PHP Common Technical text file operation and directory operation summary, _php Tutorial

PHP Common Technical text of the file operation and directory operation summary,

First, the operation of the basic file

The basic operation of the file is: file Judgment, catalogue judgment, file size, reading and writing judgment, existence judgment and file time, etc.

<?php header ("Content-type", "text/html;charset=utf-8");      /* Declare a function, pass in the filename to get the file attribute * @param string $fileName file name */function Getfilepro ($fileName) {if (!file_exists ($fileName)) { Echo ' file does not exist
';   Return }/* is a normal file */if (Is_file ($fileName)) {echo $fileName. ' is a file
';   }/* is the directory */if (Is_dir ($fileName)) {echo $fileName. ' is a directory '; }/* The type of output file */echo ' file type is: '. Getfiletype ($fileName). '
'; /* File size, conversion unit */echo ' file size is: '. GetFileSize (FileSize ($fileName)). '
'; /* File is readable */if (is_readable ($fileName)) {echo ' file is readable
'; }/* File is writable */if (is_writable ($fileName)) {echo ' file is writable
'; }/* files can be executed */if (is_executable ($fileName)) {echo ' file executable
'; The echo ' file was created: '. Date (' Y year M-month J-Day ', Filectime ($fileName)). '
'; Echo ' File last modified: '. Date (' Y year M-month J-Day ', Filemtime ($fileName)). '
'; Echo ' File last opened: '. Date (' Y year M-month J-Day ', Fileatime ($fileName)). '
';   }/* Declares a function that returns the file type * @param string $fileName file name */function Getfiletype ($fileName) {$type = ';     Switch (filetype ($fileName)) {case ' file ': $type. = ' normal file ';     Case ' dir ': $type. = ' directory file ';     Case ' block ': $type. = ' block device file ';     Case ' char ': $type. = ' character device file ';     Case ' filo ': $type. = ' piping file ';     Case ' link ': $type. = ' symbolic link ';     Case ' unknown ': $type. = ' Unknown file '; Default:} return $type; }/* Declares a function that returns the file size * @param int $bytes File bytes */function GetFileSize ($bytes) {if ($bytes >= pow (2,40)) {$retur     n = Round ($bytes/pow (1024,4), 2);   $suffix = ' TB ';     } else if ($bytes >= pow (2,30)) {$return = round ($bytes/pow (1024,3), 2);   $suffix = ' GB ';     } else if ($bytes >= pow (2,20)) {$return = round ($bytes/pow (1024,2), 2);   $suffix = ' MB ';     } else if ($bytes >= pow (2,10)) {$return = round ($bytes/pow (1024,1), 2);   $suffix = ' KB ';     } else {$return = $bytes; $suffix = 'B '; } return $return. " ". $suffix;} /* Call the function, pass in the Test.txt file under the test directory */Getfilepro ('./test/div.html ');? >

Results:

Second, the operation of the directory

Directory operations are: Traverse directory, delete, copy, size statistics, etc.

1. Traverse Directory

/* * Traverse directory * @param string $dirName directory name */function Finddir ($dirName) {$num = 0;/* Statistics Sub-file number */$dir _handle = Opendir ($dirN AME); /* Open Directory */* Output Directory file */echo '
 
 
  
  '; Echo '
  
  '; Echo '
  
   '; while ($file = Readdir ($dir _handle)) {$dirFile = $dirName. ' /'. $file; $bgcolor = $num ++%2==0? ' #ffffff ': ' #cccccc '; Echo ' 
   
     '; Echo ' 
    '; Echo ' 
    '; Echo ' 
    '; Echo ' 
    '; Echo ' 
   '; } echo " 
  
 
   
Directory '. $dirName. ' Files
 
  
 
   
 
   
 
    
FileName 
 
    
File size
 
    
file type
 
    
modification time
 
   
'. $file. '
'. FileSize ($dirFile). '
'. FileType ($dirFile). '
'. Date (' y/n/t ', Filemtime ($dirFile)). '

 
 
"; Closedir ($dir _handle); /* Close directory */echo "in". $dirName."In the catalogue, there". $num. 'Sub-file '; }/* Pass the test directory under the current directory */Finddir ('./test ');

Results

2. Statistics Directory Size

/* Statistics Directory Size * @param string $dirName directory name * @return double */function dirsize ($dirName) {   $dir _size = 0;   if ($dir _handle = @opendir ($dirName))   {while     ($fileName = Readdir ($dir _handle))     {/       * exclude two special directories *       / if ($fileName! = '. ' && $fileName! = ' ... ')       {         $subFile = $dirName. ' /'. $fileName;         if (Is_file ($subFile))         {           $dir _size + = FileSize ($subFile);         }         if (Is_dir ($subFile))         {           $dir _size + = dirsize ($subFile)         ;     }} Closedir ($dir _handle);     return $dir _size;   } }/* Pass the test directory under the current directory */$dir _size = Dirsize ('./test '); The echo './test directory file size is: '. Round ($dir _size/pow (1024,1), 2). ' KB ';

Results:

3. Delete Directory

/** Delete directory * @param string $dirName directory name */function Deldir ($dirName) {   /*php mkdir functions can create the directory */   if (file_exists ($ DirName)   {     if ($dir _handle = @opendir ($dirName))     {while       ($fileName = Readdir ($dir _handle))       {         /* Exclude two special directories *         /if ($fileName! = '. ' && $fileName! = ' ... ')         {           $subFile = $dirName. ' /'. $fileName;           if (Is_file ($subFile))           {             unlink ($subFile);           }           if (Is_dir ($subFile))           {             deldir ($subFile);}}       }       Closedir ($dir _handle);       RmDir ($dirName);       return $dirName. ' Directory has been deleted ';     }   

Delete the prompt message for success

4. Copy Directory

/* * Copy directory * @param string $DIRSRC The original directory name * @param string $dirTo The target directory name */function Copydir ($DIRSRC, $dirTo) {   if (Is_file ($dir To)   {     echo ' target directory cannot be created '; */target is not a */     return;   }   if (!file_exists ($dirTo))   {/     * directory does not exist then create *     /mkdir ($dirTo);   }   if ($dir _handle = @opendir ($DIRSRC))   {while     ($fileName = Readdir ($dir _handle))     {/       * exclude two special directories */       if ($fileName! = '. ' && $fileName! = ' ... ')       {         $subSrcFile = $dirSrc. ' /'. $fileName;         $subToFile = $dirTo. ' /'. $fileName;         if (Is_file ($subSrcFile))         {           copy ($subSrcFile, $subToFile);         }         if (Is_dir ($subSrcFile))         {           copydir ($subSrcFile, $subToFile);}}     }     Closedir ($dir _handle);     return $DIRSRC. ' Directory has been copied to '. $dirTo. ' directory ';   } } Echo Copydir ('./test ', '.. /testcopy ');

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