3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $txt_var1 = "PHP"; $txt_var2 = &$txt_str1; $txt_var2 = "MySQL"; echo $txt_var1 . $txt_var2; ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
PHPMySQL