If, line 5 of file test.txt = "color"..do...else do ...

Peuplarchie · 11-18-2008, 04:31 AM

Good day to you, I woking on a script which is customizable for the web editor to change some option on the way some item on the page are displayed. My question is: How can I put in my code something that would do : if in file "setting.txt" row 5, the word "colored" appears do this piece of code else , do this piece. This would be within a function. Thanks !

Tanax · 11-18-2008, 09:42 AM

Oh, nevermind. Misread.

xenon · 11-18-2008, 11:39 AM

well, normally, you would read a file line by line. You can use a counter to determine the current line you're on, and test that line against the string "colored" to see if it is present or not.

Kalle · 11-18-2008, 11:45 AM

PHP Code:


			
<?php

    $settings = @file('/path/to/settings/file.txt');



    if(!$settings)

    {

        die('Unable to read file');

    }



    if(strtolower($settings[4]) == 'colored')

    {

        /* then do */

    }

    else

    {

        /* else do */

    }

?>

something like that should do I guess :)

Wildhoney · 11-18-2008, 03:20 PM

I'd be inclined to use an INI file, so that it's easily formatted for anybody to edit, and then create a base class to handle the core stuff, and then extend onto it for customisation colours, customisation sizes, etcetera.

Something like the following:

php Code:

include_once 'Customisation.php';
include_once 'Customisation_Colour.php';

$pCustomisation = new Customisation();
$pColour = new Customisation_Colour();

echo $pColour->forHeaderFont();

(Please see the attached file, also.)

Wildhoney · 11-19-2008, 02:05 AM

In keeping with your style, however, I have created this for you, with a little debug functionality as well, just in case you require it.

php Code:

class Customisation
{
    private static $m_aData;
    const THROW_EXCEPTIONS = false;
    
    public static function getLine($iLine)
    {
        if (empty(self::$m_aData))
        {
            self::$m_aData = file('setting.txt');
        }
        
        if (!isset(self::$m_aData[$iLine - 1]))
        {
            if (self::THROW_EXCEPTIONS)
            {
                throw new Exception(sprintf('Line %d does not exist', $iLine));
            }
            
            return null;
        }
        
        return self::$m_aData[$iLine - 1];
    }
}

echo Customisation::getLine(3);

Then you can use it as so:

php Code:

if (Customisation::getLine(5) == 'colored')
{
    echo 'Do this';
}
else
{
    echo 'Do something else';
}

Salathe · 11-19-2008, 02:46 AM

I'd rather not have to load a whole file into memory (the OP didn't say how big it was) so here's something which only grabs what we're looking for. Of course, it's not perfect but might give you an new way of finding the right line in the file (compared to those above). It's basically putting xenon's post into code form.

PHP Code:


			
function fline($file, $pos)

{

    if ( ! $fp = fopen($file, 'r'))

    {

        throw new RuntimeException('Unable to read file '.$file);

    }    

    $line = NULL;

    $lnum = 0;

    while ($lnum++ < $pos && ! feof($fp))

    {

        $line = fgets($fp, 10240);

    }

    fclose($fp);

    return $line;

}





// rtrim the line because fline includes a trailing newline

$line = rtrim(fline('settings.txt', 5));



if ($line == 'colored')

{

    // Do something colourful

}

else

{

    // Do something boring

}