On Monday 03 June 2002 01:00 pm, you wrote:
> Sunday, June 02, 2002, 7:55:09 PM, Andre wrote:
> AD> I've been wondering why code in 'pure' php? Is there some compelling
> reason AD> (that I'm unaware of) for doing so? Should I rewrite all my
> earlier code into
>
> Andre,
> Sorry to chime in so late, but IMO, be more concerned with
> saving output for the last step in execution, because once it's echoed
> out, there's no turning back or sending headers or a redirect.. Have
> functions return strings instead of echo them (and take advantage of
> "<<<" syntax for more readable string building), build up a document
> into variables, send out at very end.
>
> Some home-grown example code might be useful:
>
> <?php
>
> //setup session, DB, some common functions
> require_once("setup_session.php");
> require_once("create_DB_object_instance.php");
> require_once("html_building_functions.php");
>
> // start building string array for later output
> $Template["title"] = "query results";
>
> // if DB problems, load content, output, quit.
> if (!$dbi->connect()) {
> $Template["main_content"] =
> join('',file("DB_down_message.html",1));
> include("main_template.php");
> exit(0);
> }
>
> // build result table HTML
> $result_table = open_result_table();
> $dbi->run_query("SELECT ..");
> while ($row = $dbi->next_row_array()) {
> $result_table .= <<<EOD
> <tr>
> <td>{$row["guns"]}</td>
> <td>{$row["butter"]}</td>
> </tr>
> EOD;
> }
> $result_table .= "</table>\n";
>
> // load results content
> $results_copy = join('',file("about_results.html",1));
>
> $Template["main_content"] .= <<<EOD
> <h1>Query Results</h1>
> $result_table
> <h2>About Results</h2>
> $results_copy
> EOD;
>
> if (//need to go elsewhere) {
> header("Location: http://elsewhere";);
> exit(0);
> }
>
> $_SESSION['last_accessed'] = $PHP_SELF;
>
> setcookie(//something);
>
> include("main_template.php");
>
> ?>
>
> Point is, at any point in execution cookies or headers can be sent or
> content changed. You end up with most content in seperate files and
> script logic/execution very easy to understand/debug. Stick a "watch"
> echo anywhere in the code and it pops up at the top of the browser
> window.
>
> For the above code, main_template.php is a full HTML document (only
> HTML editor needed) with PHP tags in just a few spots to echo elements
> of the $Template array:
>
> <!DOCTYPE ...>
> <html>
> <head>
> <title><?php echo $Template['title'] ?></title>
> </head>
> <body>
> <?php echo $Template['main_content'] ?>
> </body>
> </html>
>
> Bogdan wrote:
> > There's an urban legend saying that switching php tags on and off would
> > slow parsing down.
>
> Content outside PHP tags gets to skip the parser. From the manual:
>
> "..for outputting large blocks of text, dropping out of PHP parsing mode
> is generally more efficient than sending all of the text through
> echo() or print() or somesuch."
>
> Steve
Thanks Steve,
How I wish I had seen this before I started coding. Looks very good . . . I
might work on some changes, after all . . .
Regards,
Andre
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