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run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(mb_check_encoding("\x84", 'UTF-8'));
Output for 4.4.5 - 4.4.9, 5.2.1 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(false)
Output for hhvm-3.10.0

Process exited with code 137.
Output for 4.4.3 - 4.4.4, 5.1.3 - 5.2.0
bool(true)
Output for 5.0.0 - 5.1.2
<br /> <b>Fatal error</b>: Call to undefined function mb_check_encoding() in <b>/in/WpJQB</b> on line <b>3</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.4.2
<br /> <b>Fatal error</b>: Call to undefined function: mb_check_encoding() in <b>/in/WpJQB</b> on line <b>3</b><br />
Process exited with code 255.
Output for 4.3.0 - 4.3.1
<br /> <b>Fatal error</b>: Call to undefined function: mb_check_encoding() in <b>/in/WpJQB</b> on line <b>3</b><br />