PHP directory and file Manipulation skills Summary (create, delete, traverse, read, write, modify, etc.) _php tips

This article summarizes the PHP directory and file manipulation techniques. Share to everyone for your reference, specific as follows:

demo1.php

<?php
  //To assign a path to a variable//
  It is currently just a string, the string represents the path//file name of a directory
  containing the file name + file extension (that is, the file type.)
  // The file extension is plainly the file suffix
  $path = ' C:\AppServ\www\Basic6\Demo1.php ';
Echo basename ($path);
Echo ' <br/> ';
DirName-
The directory part//
echo dirname ($path) that returns the directory part////dirname return path in the path;
Echo ' <br/> ';
Gets the information//Print_r of the path file
(PathInfo ($path));
  $array _path = PathInfo ($path);
  echo $array _path[' dirname ']; This printed directory C:\AppServ\www\Basic6
  echo $array _path[' basename ';//This prints out the filename demo1.php
?>

demo2.php

<?php/
  /This is called absolute path
  //$path = ' C:\AppServ\www\Basic6\Demo2.php ';
  This is called the relative path
//$path = ' demo2.php ';
echo $path;
  $path = '. /index.php '; This is also the relative path of
  echo Realpath ($path);
? >

demo3.php

<?php
  $path = ' C:\AppServ\www\Basic6\Demo3.php ';
  Echo Round (FileSize ($path)/1024,2). ' KB ';
? >

demo4.php

<?php
  //Free space view Disk_free_space
  echo round (Disk_free_space (' C: ')/1024/1024/1024,2). ' GB ';
  Echo ' <br/> ';
  Total Space
  echo round (Disk_total_space (' C: ')/1024/1024/1024,2). ' GB ';
? >

demo5.php

<?php
  $path = ' C:\AppServ\www\Basic1\Demo1.php ';
  All we have to do is translate this timestamp into a normal date
  //echo fileatime ($path);
  Adjust time zone
  date_default_timezone_set (' Asia/shanghai ');
  Format a local date
  //echo date (' y-m-d h:i:s ');
  Fileatime-Gets the file's last access time
  Echo ' last visit: '. Date (' y-m-d h:i:s ', Fileatime ($path)). ' <br/> ';
  Filectime--Gets the inode modification time of the file, file owner, permission
  Echo ' permission owner, and so on: '. Date (' y-m-d h:i:s ', Filectime ($path)). ' <br/> ';
  Filemtime--Get file modification time, the contents of the file changes after the time
  echo ' content modification time: '. Date (' y-m-d h:i:s ', Filemtime ($path));
? >

demo6.php

<?php
  //Open a file
  ///first parameter indicating which file, the second parameter indicates mode, W only write
  //w if, file.txt already has, and has the data. So this file, recreate
  //If not file.txt this file, then I will create
////fopen--open file or URL
////fopen Return is the resource type resource, we generally call it the handle, or the resource handle
//$fp = fopen (' file.txt ', ' W ');
////
want to write some data in the file
////fwrite ($FP, "read who asked the chant, water fall fragrance floating." ");
//$outString = "read who asked you to chant, water fall fragrance floating." ";
echo strlen ($outString);//Get length
//Fwrite ($FP, $outString, strlen ($outString));
////fclose--Close an open file pointer/////////////
fclose ($fp) when opening a file;
  There is only one sentence, do not need any other flexible things to use
  //This relatively good, only in the PHP5 version can use
  file_put_contents (' file2.txt ', ' read who asked you chant, water fall fragrance floating. ');
? >

demo7.php

<?php
  //The first way to
  //\r\n a text file is to change
  the line $fp = fopen (' file.txt ', ' a ');
  $outString = "read who asked you to recite, \ r \ n water Fall fragrance floating." \ r \ n ";
  Fwrite ($fp, $outString, strlen ($outString));
  Fclose ($FP);
  The second type of writing
//file_put_contents (' file2.txt ', ' read who asked you to recite, \ r \ n water Fall fragrance floating. ');
? >

demo8.php

<?php
  //Now read out the file
  $fp = fopen (' file.txt ', ' R ');
  Fgetc-Reads the character
//Echo fgetc ($FP) from the file pointer;
echo fgetc ($fp);
echo fgetc ($fp);
echo fgetc ($FP); Read who
  //fgets--reading a row from the file pointer
  //fread () reads a row from the file pointed to by handle and returns a string that has a maximum length of length-1 bytes.
  //echo fgets ($fp);
  Can filter HTML
  //echo fgetss ($fp);
  Echo Fread ($FP, 2);
  Fread () reads the maximum length of bytes from the file pointed to by handle
  //echo fread ($fp);
  Fpassthru--All the remaining data//fpassthru the output file pointer
  also contains functionality that is output to the browser, so no echo
  echo fpassthru ($FP) is required;
  Fclose ($FP);
? >

demo9.php

<?php
  //file--Reads the entire file into an array
  //file is stored in an array in each row
  //print_r (file (' file.txt '));
  And this prints out the second line in the file.
//$array _file = File (' file.txt ');
echo $array _file[4];
  ReadFile--Output a file
  //readfile is the entire file read out, ReadFile itself can enter the browser directly, so do not need
  the echo//return value is the total length of the file bytes
  //echo ReadFile (' file.txt ');
  File_get_contents-Reads the entire file into a string
  //file_get_contents can read the data into the buffer and print
  echo file_get_contents (' File.txt ');
? >

demo10.php

<?php
  //Now read out the file
  $fp = fopen (' file.txt ', ' R ');
  Feof--Tests whether the file pointer is at the end of the file while
  (!feof ($fp)) {
    echo fgetc ($FP);
  }
  Fclose ($FP);
? >

demo11.php

<?php//
  For example, when reading a file, you have to ensure that the file must exist before you can operate
  //or error, do not let the implementation//
  this time have to do a test
  //file_exists- Check if the file or directory exists if
  (file_exists (' file.txt ')) {
    echo ' performs various text read and write operations! ';
  } else{
    Echo ' This article does not exist, ask the administrator to regenerate in the background. ';
  }
? >

demo12.php

<?php
  //Text size, byte
  //echo filesize (' file.txt ');
  Deletes a file
  //unlink (' a.txt ');
  Rewind--back to the position of the file pointer
  //ftell--Returns the position of the file pointer read/write
  //rewind--The position of the file pointer back to the
  //a representation can append, B represents binary, so portability is good
  //w
  $fp = fopen (' file.txt ', ' ab ');
echo fgetc ($fp);
echo fgetc ($fp);
echo fgetc ($fp);
echo fgetc ($fp);
Rewind ($FP);
Echo Ftell ($fp);
Fseek ($FP);
Echo Ftell ($fp);
echo fgetc ($fp);
echo fgetc ($fp);
  Flock ($FP, LOCK_EX);//Lock
  fwrite ($fp, ' This is lock! ');
  Flock ($FP, lock_un);//Unlock
  fclose ($fp);
? >

demo13.php

<?php////
open a directory
//@ $dir = Opendir (' C:\AppServ\www\Basic6 ');
read out the directory, use a loop to read
////readdir-Read the entry////string from the directory handle
if it is a Boolean value, that is, the string is not empty, then it is true, empty is false
//while (!! $file = Readdir ($dir)) {
//   echo $file. ' <br/> ';
}////
close
//@closedir ($dir);
  Print_r (Scandir (' C:\AppServ\www\Basic6 '));
  Deletes a directory///
absolute Path Deletion directory
//rmdir (' C:\AppServ\www\Basic6\delMe ');
Deletion directory of relative path
//rmdir (' Delme ');
  Deletes a file
  //ssunlink (' file2.txt ');
  Rename, here, directories and files can be changed
  //rename (' file.txt ', ' file2.txt ');
>

More about PHP Interested readers can view the site topics: "PHP file Operation Summary", "PHP Directory Operation skills Summary", "PHP Basic Grammar Primer", "PHP operation and operator Usage Summary", "PHP object-oriented Programming Program", " PHP Network Programming skills Summary, "PHP string (String) Usage summary", "PHP Array" Operation Tips Encyclopedia, "php+mysql database Operation Tutorial" and "PHP common database Operation Skills Summary"

I hope this article will help you with the PHP program design.