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<?php $cat = 'cat'; echo($cat . 's' . PHP_EOL); echo("{$cat}s \n"); ?>
Output for 4.3.10 - 4.4.9, 5.0.2 - 7.1.0
cats cats
Output for 4.3.0 - 4.3.9, 5.0.0 - 5.0.1
Notice: Use of undefined constant PHP_EOL - assumed 'PHP_EOL' in /in/OmnZJ on line 3 catsPHP_EOLcats