Randomize Background Image using php. Set up and array of filenames, which correspond to the file names of the images you are trying to randomize. At page refresh your visitors get to see a different background to your sites.

1. Above the DOCTYPE

Set up and array of filenames, which correspond to the file names of the images you are trying to randomize.

<?php $bg = array(’bg-01.jpg’, ‘bg-02.jpg’, ‘bg-03.jpg’, ‘bg-04.jpg’, ‘bg-05.jpg’, ‘bg-06.jpg’, ‘bg-07.jpg’ ); // array of filenames $i = rand(0, count($bg)-1); // generate random number size of the array $selectedBg = “$bg[$i]“; // set variable equal to which random filename was chosen ?>

1. CSS in the HEAD section

Normally you’d want to keep CSS out of the HTML, but we’ll just use it here to echo out the random file name we selected above.

<style type=”text/css”> <!– body{ background: url(images/<?php echo $selectedBg; ?>) no-repeat; } –> </style>