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run code in 150+ php & hhvm versions
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<?php $value = 'Rufus bit the Dog!'; echo "$value\n"; echo '$value';
Output for 4.3.0 - 5.6.22, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Rufus bit the Dog! $value