Script that swaps image folders depending on the season

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Warn vote4pedro · View vote4pedro's Warnings · View your Warnings · #1

November 30th, 2012, 08:10 AM

vote4pedro

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php4 - Script that swaps image folders depending on the season

hi

im trying to create a script that swaps image folders depending on the season. This can be used for website headers or adverts so during easter for instance you could swap to a theme for your header image without manually doing it. when the folder is chossen the script randomly chooses an image form the folder.

Its not working however hense this post, anyone with even a small amount of php knowlege will probably spot the problem straight away.
Please could you help me get this working.
I call it using a css style

background: #0c1a3e URL(../rotate.php) no-repeat center center ;

Thanks

PHP Code:


		
			
<?php

// 23march to20june spring



if ((date('m') == 03) && (date('d') >= 23) || (date('m') == 06) && (date('d') <= 20)) { $folder = './images/personal/headers/spring/'; }





// 21june 22sept summer

else if ((date('m') == 06) && (date('d') >= 21) || (date('m') == 09) && (date('d') <= 22)) { $folder = './images/personal/headers/summer/'; }



// 23 sept to dec 20 autumn



else if ((date('m') == 09) && (date('d') >= 23) || (date('m') == 12) && (date('d') <= 20)) { $folder = './images/personal/headers/autumn/'; }





// 21 dec to 22 march winter



else ((date('m') == 12) && (date('d') >= 21) || (date('m') == 03) && (date('d') <= 22)) { $folder = './images/personal/headers/winter/'; }



//otherwise



// else { $folder = './images/personal/headers/'; }



// Space seperated list of extensions, you probably won't have to change this.

$exts = 'jpg jpeg png gif';



$files = array(); $i = -1; // Initialize some variables

if ('' == $folder) $folder = './';



$handle = opendir($folder);

$exts = explode(' ', $exts);

while (false !== ($file = readdir($handle))) {

foreach($exts as $ext) { // for each extension check the extension

if (preg_match('/\.'.$ext.'$/i', $file, $test)) { // faster than ereg, case insensitive

$files[] = $file; // it's good

++$i;

}

}

}

closedir($handle); // We're not using it anymore

mt_srand((double)microtime()*1000000); // seed for PHP < 4.2

$rand = mt_rand(0, $i); // $i was incremented as we went along



header('Location: '.$folder.$files[$rand]); // Voila!

?>

Warn IAmALlama · View IAmALlama's Warnings · View your Warnings · #2

November 30th, 2012, 12:04 PM

IAmALlama

Join Date: Apr 2007

Location: San Diego, CA

Posts: 2,263

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First, your date matching is incorrect. You will have better luck using timestamps and time()/strtotime().

You can do something like:

PHP Code:


		
			
//get a timestamp for the start of each season

$spring = strtotime('23 march');

$summer = strtotime('21 june');

$autumn = strtotime('23 september');

$winter = strtotime('21 december');



//get the current timestamp

$current = time();



//then check each season in reverse order

//if past winter start

if($current >= $winter){

    $season = "winter";



//if past autumn start

} elseif($current >= $autumn){

    $season = "autumn";



//if past summer start

} elseif($current >= $summer){

    $season = "summer";



//if past spring start

} elseif($current >= $spring){

    $season = "spring";



//if before spring start, must be previous year winter still

} else {

    $season = "winter";

}

As for the reading a random file, what you have might work (I didn't test it, it looks ok) but there are better functions that are easier to work with such as glob().

PHP Code:


		
			
//get the full folder using the season var set above

$folder = "./images/personal/headers/{$season}/";



//get an array of files matching the extensions jpg,jpeg,png,gif in that folder

$files = glob("{$folder}*.{jpg,jpeg,png,gif}", GLOB_BRACE);



//get a random key from the array

$rand = array_rand($files);



//get the filename from the list of files

$filename = $files[$rand];



//get the extension to determine header

$ext = substr($filename, strrpos($filename,'.'));



//send out correct header based on ext

header("Content-Type: image/{$ext}");



//output the file

readfile($filename);

I also changed the header redirect that you were doing with what I feel is better which is to just output the header and read the file.

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vote4pedro agrees!

Warn vote4pedro · View vote4pedro's Warnings · View your Warnings · #3

December 2nd, 2012, 04:53 PM

vote4pedro

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Join Date: Nov 2012

Posts: 2

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Awesome Thanks

php4 - Script that swaps image folders depending on the season

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