Open Operators : Open file « File « Perl






  1. Perl
  2. File
  3. Open file

Open Operators

    


Operation              Syntax                               Description

Read                   open(INFILE,"<filename");            Read from the file.

Write                  open(OUTFILE, ">filename");          Destroy any existing file and write to a new file.

Append                 open(APP, ">>filename");             Write to the end of an existing file.

Read/write             open(RW, "+<filename");              Read and write from an existing file.

Write to a program     open(PIPEOUT, "|filename");          Send data to a program or command. Also called opening a program pipe.

Read from a program    open(PIPEIN"filename|");             Receive data from a program or command.








Related examples in the same category

1.To open a file for appending:
2.To open a file for reading and writing:
3.To open a file for reading:
4.To open a file for writing
5.open (FILEHANDLE, "<&FILEHANDLE2");
6.open (FILEHANDLE2, "<&=FILEHANDLE");
7.open(MYFILE, ">>c:\\outfile.dat")
8.Open FILEHANDLE
9.Open a file
10.Open a file from another file handle
11.Open a file to read
12.Open a pipe to the who command
13.Open command expressions
14.Open file for update
15.Open file for writing
16.Open file reading
17.Open for Appending
18.Open for Reading
19.Open for Reading and Writing
20.Open for Writing
21.Open for writing first, then reading
22.Opening an input filter on a Win32 platform
23.Opening files and using file handles: open(filehandle, name);
24.Opens two files and copies one into another.
25.Checks whether an unopened file actually exists.
26.Input Filter: open(FILEHANDLE, COMMAND|);
27.Sending the Output of a Filter to a File: open(STDOUT, ">/dev/tty");
28.Uses die when testing for a successful file open operation.
29.Using open to connect different processes