Perl file manipulations

File Operation modes:. You can open a file for reading, writing, appending and others, you can even tell Perl to create the file if it doesn't already exist. And Perl will print that string to the file handle DATA, which means it writes it to the opened file.

Pretty simple really Open, is also one method of talking to the mail server on your hosting server when you want your Perl script to send an email, but that's something I will leave till I show you an example.

One thing that is also important to cover, is file locking flock. For input and output, the two main types are user and file input-output. User input is obviously what the user is telling your program to do. The output is therefore what the program is spitting back out onto the screen. Usually in CGI though, this aspect of Perl is generally not used as much To read from a file, it must be opened and given a name first. You must also know the full path to the file.

Below is an example Usually the name given to the file is descriptive and will allow you to easily identify what the file contains later. Saving it into a scalar variable will put everything in that file on one single line. Saving the file into an array, on the other hand, will split up the file by each new line and store it into each slot in the array. Kindly suggest — user Add a comment. Active Oldest Votes. A few comments on your code. Improve this answer.

Chris Charley Chris Charley 6, 2 2 gold badges 21 21 silver badges 25 25 bronze badges. Hi Thank you for the input. But I have one more doubt I have changed my input format.

Then I tried using the code which is given but it is not printing any output. The changes in the input is updated in the above input description Kindly suggest — user Use a buffer and print the lines if lines in the buffer do not match Pen or Laptop. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

Post as a guest Name.