Automatically convert plain text to Web pages with PHP

Recently, an old friend of mine called me for help. He has worked as a journalist for many years and recently gained the right to publish many of his early columns. He wanted to put his work on the web, but his columns were saved as plain text files, and he had neither the time nor the desire to learn HTML in order to convert them into Web pages. Since I was the only computer-savvy person in his phone book, he called me to see if I could help him.
"Let me handle it," I said, "and call me back in one hours." "Of course, when he called me a few hours later, I had prepared a solution for him," he said. It takes a little bit of PHP, and I harvest his endless thanks and a box of red wine.

So what have I done in the next one hours? This is the content of this article. I'll show you how to use PHP to quickly transform pure ASCII text into readable HTML markup.

First, let's look at an example of a plain text file that my friend wants to convert:

Green for mars!

John R. Doe

The idea of little green men from Mars, long a staple of science fiction, may soon turn out to be less fantasy and more FA Ct.

Recent samples sent by the latest Mars exploration team, indicate a high presence of chlorophyll in the atmosphere. Chlorophyll, you'll recall, is what makes plants green. It's quite likely, therefore, that organisms on Mars would have, through continued exposure to the green stuff, developed a Greenish tinge on their outer exoskeleton.

An interview with Dr. Rushel Bunter, the head of ASDA ' s Mars colonization Project blah blah ...

What does this mean for you? So, it means blah blahblah ...

Track follow-ups to the story online at http://www.mars-connect.dom/. To-pictures of the latest samples, log on to http://www.asdamcp.dom/galleries/220/

Fairly standard text: it has a title, a signature, and many paragraphs of text. What you really need to do to translate this document into HTML is to keep the layout of the original text on a Web page using HTML's branch and paragraph tags. Extraordinary punctuation needs to be converted into corresponding HTML symbols, and hyperlinks need to be clickable.

The following PHP code (listing a) completes all of the above tasks:

List A

Let's take a look at how it works:

The following is a reference fragment:
<?php
Set source file name and path
$source = "Toi200686.txt";

Read raw text as array
$raw = File ($source) or Die ("Cannot read file");

Retrieve and second lines (title and author)
$slug = Array_shift ($raw);
$byline = Array_shift ($raw);

Join remaining data into string
$data = Join (", $raw);

Replace special characters with HTML entities
Replace line breaks with <br/>
$html = NL2BR (Htmlspecialchars ($data));

Replace multiple spaces with single spaces
$html = preg_replace ('/ss/', ', $html);

Replace URLs with <a href...> elements