Batch processing and File system: File system processing in PHP

Open file, process file, close file
1 Open, close the file
Is_file ($filename)
Resource fopen ($filename, $mode [, Use_include_path)
$filename: Can be an absolute path or a relative path
$mode is open mode, read and write ... Wait
The third is whether to open the file under this path of the server.
Close File
BOOL Fclose (resource handle);
Sample
$f = fopen ("A.txt", "RB");
Fclose ($f)
2. Read and Write files
int ReadFile ($FILENAME) reads the entire file write to the output buffer, does not need to open the file, does not need echo,print.
Array file ($filename) reads the contents of the entire file and is stored in rows to an array.
File_get_contents ($filename,) reads a file into a string
Read one line:
Fgets ($resource) read one row at a time. If a newline character is encountered, EOF reads to the specified length and ends.
FGETSS ($resource, $length) A variant of the above function that filters out html,php tags
Read a character
Fgetc ($resource)
Determine if the end of the file place
while (!feof ($resource))
Fread ($resource, length) reads the specified length of data.
Writing data to a file
Fwrite ($resource, $string, length)
File_put_contents ($filename, $string)
Other file Actions
BOOL Copy ($path 1, $path 2)
BOOL Rename ($filename 1, $filename 2)
BOOL Unlink ($filename) deleting files
Array PathInfo ($FILENAME)
Realpath ($filename) Absolute path
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Directory functions, Directory operations
If you open a file that does not exist, a new file is created and an error occurs if you open a non-existent amount.
Open, close directory
Resource Opendir ($path)
@opendir ($path) Suppress error output
Closedir ($resource) closes the directory.
Is_dir () First Judge $path to open again.
Browse Catalog Scandir
Array Scandir ($path)
Directory Operations
BOOL MkDir ($path) Create a new specified directory
BOOL RmDir ($dirname) deletes a directory that the directory must make empty
String getcwd () get current working directory
BOOL ChDir () Change the current directory to.
Advanced Applications
fopen ("http://127.0.0.1/tm/sl/index.php") Open the remote file ... PHP Configuration Allow_url_fopen on
File pointers:
BOOL Rewind ($resource) point the file pointer to the beginning
Fseek ($resource, $offset, $model) Locate the file pointer
BOOL Feof ($resource) determines whether at the end of the file
Ftell ($resource) quote the position of the pointer
Lock file Flock ($resource, $model)
File Upload
Phpini settings,
1 whether to allow uploading files file_uploads on off
2upload_tmp_dir upload files to the temporary directory
3:upload_max_filesize server allows maximum MB to be uploaded
Predefined variable #$_files
Array first-level key named name, second-level key name Name,size,tmp_name (Move_upload_file ($sourcefile, $ destination)), Type,error (0 for success)
Multiple file uploads, name= "name[]"
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