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run code in 150+ php & hhvm versions
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<?php $name = "Alice"; print "${name} said Hello World to the crowd of people.\n"; print "${'name'} said Hello World to the crowd of people.\n"; print "$name said Hello World to the crowd of people.\n";
based on IgJbM
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Alice said Hello World to the crowd of people. Alice said Hello World to the crowd of people. Alice said Hello World to the crowd of people.
Output for hhvm-3.10.0

Process exited with code 153.