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run code in 150+ php & hhvm versions
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<?php echo (strtoupper("hi my name is kelsey")); echo (strtolower("HI MY NAME IS KELSEY")); echo (ucfirst("hi my name is kelsey")); echo (ucwords("hi my name is kelsey")); ?>
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
HI MY NAME IS KELSEYhi my name is kelseyHi my name is kelseyHi My Name Is Kelsey
Output for hhvm-3.10.0

Process exited with code 153.