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run code in 200+ php & hhvm versions
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<?php function myTest(){ static $x=0; echo "$x"; $x++; } myTest(); echo "br"; myTest(); echo "br"; myTest(); ?>
Output for 5.6.30, hhvm-3.15.4 - 3.22.0, 7.0.0 - 7.2.9
0br1br2