PHP Coding making different Iframe codes appear - php

Question

Hello so I have this code here <iframe frameborder="0" height="550" marginheight="0" marginwidth="0" scrolling="auto" src="http://example.com/signup.php" width="1000"></iframe> now I was wondering is there any way to make a php script that can choose a random iframe code and display the php script on the page for example
<iframe frameborder="0" height="550" marginheight="0" marginwidth="0" scrolling="auto" src="website1.com/signup.php" width="1000"></iframe>
<iframe frameborder="0" height="550" marginheight="0" marginwidth="0" scrolling="auto" src="website2.com/signup.php" width="1000"></iframe>
like in website 1 and 2 but have it so each time a person loads that page it switches from site 1 to site 2 and embeds the php or is that n

Answer 1

You could simplify this easily. Try adding the sites to an array like this:
$sites = array(
'site1.com',
'site2.com',
'site3.com',
'site4.com',
'site5.com',
'site6.com',
'site7.com'
);
Now you can use features like array_rand() to pick a random entry from the site to show in your <iframe>:
<?php
$site_to_use = array_rand($sites);
?>
<iframe frameborder="0" height="550" marginheight="0" marginwidth="0" scrolling="auto" src="<?php echo $sites[$site_to_use]; ?>/signup.php" width="1000"></iframe>
Or you could even use rand() like this:
<iframe frameborder="0" height="550" marginheight="0" marginwidth="0" scrolling="auto" src="<?php echo $sites[rand(0, (count($sites - 1)))]; ?>/signup.php" width="1000"></iframe>
That avoids the hassles of large if else or switch casestatements.
Example