PHP Common Technical text file operation and catalog operation Summary _php Example

Operation of basic files

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"); * * Declares a function, passing in the filename gets the file attribute * @param string $fileName file name */function Getfilepro ($fileName) {if!file_exists ($fileName
     ) {echo ' file does not exist <br/> ';
   Return
   }/* is a normal file/if (Is_file ($fileName)) {echo $fileName. ' is a file <br/> ';
   }/* is directory */if (Is_dir ($fileName)) {echo $fileName. ' is a directory '; /* Output file type/echo ' file type is: '. Getfiletype ($fileName). '
   <br/> '; /* File size, conversion unit */echo ' file size is: '. GetFileSize (FileSize ($fileName)). '
   <br/> ';
   /* file is readable/if (is_readable ($fileName)) {echo ' file readable <br/> ';
   }/* file is writable/if (is_writable ($fileName)) {echo ' file writable <br/> ';
   }/* file can execute/if (is_executable ($fileName)) {echo ' file executable <br/> '; Echo ' File creation time: '. Date (' Y m month J Day ', Filectime ($fileName)). '
   <br/> '; Echo ' File last modified: '. Date (' Y m month J Day ', Filemtime ($fileName)). '
   <br/> '; Echo ' File last Open time: '. Date (' Y-M-month J-Day ', Fileatime ($fileName)). '
 <br/> ';
   }/* 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 ' blocks ': $type. = ' block device file ';
     Case ' char ': $type. = ' character device file ';
     Case ' filo ': $type. = ' pipe file ';
     Case ' link ': $type. = ' symbolic link ';
     Case ' unknown ': $type. = ' Unknown file ';
 Default:} return $type;
     * * * Declaration of a function, return file size * @param int $bytes File Bytes/function getfilesize ($bytes) {if ($bytes >= pow (2,40)) {
     $return = Round ($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 function, incoming test.txt file in Test directory */Getfilepro ('./test/div.html ');?>

Results:

Ii. operation of the directory

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

1, traverse the directory

 * * Traverse directory * @param string $dirName directory name/function Finddir ($dirName) {$num = 0;/* Statistics Number of sub files * * $dir _handle = Open Dir ($dirName);
   /* Open Directory//////////////////////////////* <table border= "0" align= "center" width= "0" cellspacing= "0" > "
   echo ' <caption> 

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 ($dir _handle))
     {/
       * excluding two special directories * * *
       if ($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 current directory of the test directory * * * *
 $dir _size = Dirsize ('./test ');
 The echo './test directory file size is: '. Round ($dir _size/pow (1024,1), 2). ' KB ';

Results:

3, delete the directory

*
* Delete directory *
@param string $dirName directory name
 /function Deldir ($dirName)
 {
   /*php mkdir functions to create a directory * /
   if (file_exists ($dirName))
   {
     if ($dir _handle = @opendir ($dirName))
     {while
       ($fileName = Readdir ($dir _handle))
       {/
         * excludes two special directories *
         /if ($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 '
     ;
 }} /* Pass a copy of the test directory test1*/
 Echo deldir ('./test1 ');
 

Delete a successful message

4. Copy Directory

/* Copy directory * @param string $DIRSRC The original directory name * @param string $dirTo The target directory name/function Copydi
   R ($DIRSRC, $dirTo) {if (Is_file ($dirTo)) {echo ' target directory cannot be created ';/* target is not a/return;
   if (!file_exists ($dirTo)) {/* directory does not exist create/mkdir ($DIRTO);
       } if ($dir _handle = @opendir ($DIRSRC)) {while ($fileName = Readdir ($dir _handle)) {/* excluding 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 ');