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run code in 200+ php & hhvm versions
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<?php $xxx = "test"; function check($x, $y = "") { if($x === "test") { echo "yeah!"; } else { echo ":("; } } check("test"); check($xxx);
Output for 4.3.0 - 5.6.38, hhvm-3.10.1 - 3.22.0, 7.0.0 - 7.2.12
yeah!yeah!