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<html> <body> <?php $a = 0; $b = 0; for ( $i=0; $i<5; $i++ ) { $a += 10; $b += 5; } echo ("At the end of the loop a=$a and b=$b" ); ?> </body> </html>
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
<html> <body> At the end of the loop a=50 and b=25</body> </html>
Output for hhvm-3.10.0

Process exited with code 153.