'Why isn't my image un-caching? [closed]

I need an image to constantly be updated when the page is reloaded so I decided to put a number at the end of the path but for some reason my code keeps breaking the page:

<?php $t = getDate(); ?>
<img src="<?php bloginfo('template_url'); ?>/img/logo-apptivation.jpg?t=<?php .$t ?>"/>

Whats wrong?

phpcachingcache-controlimage-caching


Solution 1:[1]

<img src="<?php bloginfo('template_url'); ?>/img/logo-apptivation.jpg?t=<?php echo time(); ?>"/>

Solution 2:[2]

<img src="<?php printf('%s/img/logo-apptivation.jpg?%s', 
                             bloginfo('template_url'),time());?>"/>

Sources

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Source: Stack Overflow

Solution Source
Solution 1 lauriys
Solution 2

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