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This example uses an array to store images and then produces a random

number and display the image on the screen <?php //an array of 4 images in the same direcory as the script $images = array("a1.gif","a2.gif","a3.gif","a4.gif"); //generate a random number srand((double)microtime()*1000000); $randomno = (rand()%4); //display image echo ("<img src=\"$images[$randomno]\">"); ?>