PHP Common Technical text file operation and directory operation summary _php tutorial

Summary of file operation and directory operation in common technical text of PHP

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.

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Header ("Content-type", "text/html;charset=utf-8"); /* * Declare a function, pass in the file name to get the files properties * @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 $fileName. ' is a directory '; } /* Type of output file */ The echo ' file type is: '. Getfiletype ($fileName). ' '; /* File size, conversion unit */ The echo ' File size is: '. GetFileSize (FileSize ($fileName)). ' '; /* File is readable */ if (is_readable ($fileName)) { Echo ' File readable '; } /* File is writable */ if (is_writable ($fileName)) { Echo ' file can be written '; } /* File is executable */ if (is_executable ($fileName)) { Echo ' File executable '; } Echo ' File creation time: '. 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)). ' '; } /* * Declare a function that returns the file type * @param string $fileName file name */ function Getfiletype ($fileName) { $type = "; Switch (filetype ($fileName)) { Case ' file ': $type. = ' normal file '; break; 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; } /* * Declare a function that returns the file size * @param int $bytes file byte number */ function GetFileSize ($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 the function and pass in the Test.txt file in 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

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/* * Traverse Directory * @param string $dirName directory Name */ function Finddir ($dirName) { $num = 0; /* Count the number of sub-files */ $dir _handle = Opendir ($dirName); /* Open Directory */ /* Output Directory file */ Echo ' Echo ' Echo ' Echo ' while ($file = Readdir ($dir _handle)) { $dirFile = $dirName. ' /'. $file; $bgcolor = $num ++%2==0? ' #ffffff ': ' #cccccc '; Echo ' Echo ' Echo ' Echo ' Echo ' Echo ' } echo " '; '; < p=""> '; '; '; '; '; '; '; Directory '. $dirName. ' Files file name File Size File Type modification Time '. $file. ' '. FileSize ($dirFile). ' '. FileType ($dirFile). ' '. Date (' y/n/t ', Filemtime ($dirFile)). ' "; Closedir ($dir _handle); /* Close the directory */ echo "in ". $dirName. " Directory under ". $num. ' sub-file '; } /* Pass the test directory under the current directory */ Finddir ('./test ');

Results

2. Statistics Directory Size

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/* * 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

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/* * Delete Directory * @param string $dirName directory Name */ function Deldir ($dirName) { The mkdir function in/*php can create a 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 '; } } } /* Pass a copy of the test directory test1*/ echo Deldir ('./test1 ');

Delete the prompt message for success

4. Copy Directory

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/* * Copy Directory * @param string $DIRSRC The original directory name * @param string $dirTo target directory name */ function Copydir ($DIRSRC, $dirTo) { if (Is_file ($dirTo)) { Echo ' target directory cannot be created '; */target is not a */ Return } if (!file_exists ($dirTo)) { /* Directory does not exist then create */ mkdir ($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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