PHP file Processing

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File Judgment function

Is_dir ()

Is_executable () to determine whether an executable file

Is_file ()

Is_link () Determine if the file name is a symbolic connection

Is_readable ()

Is_uploader_fiel () Determine if the file was uploaded via HTTP post

Is_writable ()

File properties

File_exists ()

FileSize ()

Is_readable ()

Is_writeable ()

Filectime ()

Filemtime ()

Fetch file name basename ()

Fetch directory DirName ()

File path information PathInfo ()

Create a file Touch ($file)

Delete File unlink ($file)

Move file (rename file) rename ("Current file path", "Destination file path")

Copy the file copy ("File name", "path")

Read and write files

File_get_contents ()

File_put_contents ()

fopen ("URL", Mode)

Various modes:

R: Read-only mode open file r+: Read and write mode W: write-only mode open, if the file does not exist, then new, if the file has content, then overwrite w+: Read and write mode A: write-only mode open, if the file does not exist, then new, if the file already has content, add a A +: Read T: Open file in text mode

Fread ()//reads the specified length of characters; Fread ("$file", FileSize ("Text.txt"))

FGETC ()//read one character at a time from the file;

Fgets ()//reads one line of characters from a file at a time;

Feof ($file)//Error reading the file or returning to the end of the file true

Write file

Fwrite ()

Move pointer inside file

Ftell ($file)//return current pointer position

Fseek ($file, 100, constant)//move file pointer

Rewind ()

basename (file path [, file suffix name]) Gets the file name, the second parameter is the PathInfo (file path) to parse the current path, returns an associative array, referenced by dirname,basename,extension Realpath (file relative path) displays the file absolute path filesize ($file) calculates the file size Fileatime ($file) shows the last visited time Filectime ($file) file settling time Filemtime ($file ) file last update fileperms () returns the file attributes and Permissions Fileowner () get the file owner

Directory Operations:

Opendir () Readdir () Closedir () Rewinddir ()//pointer returns the first table of contents

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