Fopen help

Alpha · Oct 26, 2003

fopen

This is the BIGGEST part I struggle with. I don't know how to do it in ANY programming language. If someone could explain to me how I would write the phrase "This is a test" to a file and then output it to the screen I'd be VERY happy

You can do it in PHP or Python, doesn't matter.

deadserious · Oct 27, 2003

Actually not all languages use fopen for opening files. Here's a few examples of the various methods different languages use. Each example opens file.txt for appending, writes a string to it, reopens the file for reading and outputs the content to the browser. If you want to overwrite the content of the file rather than append to it you can switch the "a" to "w" for both PHP and Python and change the ">>" to ">" for Perl.

PHP

Code:

<?
$file = fopen ("file.txt", "a");
fwrite ($file, "This is a PHP test<br />n");
fclose ($file);

$file = fopen ("file.txt", "r");
$lines = fread ($file, filesize ("file.txt"));
fclose ($file);
echo $lines;
?>

Python

Code:

#!/usr/bin/python

print "Content-type: text/htmlrnrn"

file = open('file.txt','a')
file.write("This is a Python test<br />n")
file.close()

file = open('file.txt','r')
for lines in file.readlines():
    print lines,
file.close()

Perl

Code:

#!/usr/bin/perl

print "Content-type: text/htmlnn";

open (FILE, ">>file.txt");
print FILE "This is a Perl test<br />n";
close (FILE);

open (FILE, "file.txt");
@lines = <FILE>;
close (FILE);
print @lines;

Alpha · Oct 28, 2003

Thanks very much!

That will help me get it straight! BTW is it possible to create txt files with Python? So that if a txt file doesnt exist and you try to write to it it will be created?

deadserious · Oct 31, 2003

Yes Python will attempt to create the file if it doesn't exist when opened for appending or writing.

Fopen help

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