3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php echo "Compare two numeric strings (same semantic 1): (NAN == 0) = " . (NAN == 0 ? 'true' : 'false') . "\n"; echo "Compare two numeric strings (same semantic 2): (NAN > 1 ) = " . (NAN > 1 ? 'true' : 'false') . "\n"; echo "Compare two numeric strings (same semantic 3): (NAN < 1) = " . (NAN < 1 ? 'true' : 'false') . "\n"; echo "Compare two numeric strings (same semantic 4): (NAN == -1) = " . (NAN == -1 ? 'true' : 'false') . "\n"; echo "Compare two numeric strings (same semantic 5): (NAN > -1) = " . (NAN > -1 ? 'true' : 'false') . "\n"; echo "Compare two numeric strings (same semantic 6): (NAN > -1) = " . (NAN > -1 ? 'true' : 'false') . "\n";
Output for 4.3.6 - 5.3.29, 7.0.0 - 7.1.0
Compare two numeric strings (same semantic 1): (NAN == 0) = false Compare two numeric strings (same semantic 2): (NAN > 1 ) = true Compare two numeric strings (same semantic 3): (NAN < 1) = true Compare two numeric strings (same semantic 4): (NAN == -1) = false Compare two numeric strings (same semantic 5): (NAN > -1) = true Compare two numeric strings (same semantic 6): (NAN > -1) = true
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0
Compare two numeric strings (same semantic 1): (NAN == 0) = false Compare two numeric strings (same semantic 2): (NAN > 1 ) = false Compare two numeric strings (same semantic 3): (NAN < 1) = false Compare two numeric strings (same semantic 4): (NAN == -1) = false Compare two numeric strings (same semantic 5): (NAN > -1) = false Compare two numeric strings (same semantic 6): (NAN > -1) = false
Output for 4.3.0 - 4.3.5
Notice: Use of undefined constant NAN - assumed 'NAN' in /in/3NFiU on line 2 Compare two numeric strings (same semantic 1): (NAN == 0) = true Notice: Use of undefined constant NAN - assumed 'NAN' in /in/3NFiU on line 3 Compare two numeric strings (same semantic 2): (NAN > 1 ) = false Notice: Use of undefined constant NAN - assumed 'NAN' in /in/3NFiU on line 4 Compare two numeric strings (same semantic 3): (NAN < 1) = true Notice: Use of undefined constant NAN - assumed 'NAN' in /in/3NFiU on line 5 Compare two numeric strings (same semantic 4): (NAN == -1) = false Notice: Use of undefined constant NAN - assumed 'NAN' in /in/3NFiU on line 6 Compare two numeric strings (same semantic 5): (NAN > -1) = true Notice: Use of undefined constant NAN - assumed 'NAN' in /in/3NFiU on line 7 Compare two numeric strings (same semantic 6): (NAN > -1) = true