3v4l.org

run code in 150+ php & hhvm versions
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<?php $testString = "font-family: 'Helvetica Neue'"; echo htmlspecialchars($testString, ENT_COMPAT, 'utf-8');
based on mTkvc
Output for 4.3.2 - 7.1.0
font-family: 'Helvetica Neue'
Output for 4.3.0 - 4.3.1

Process exited with code 139.