3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $n = 0; $heights = array(); $n = readline(); for($i = 1; $i<=$n; $i++) { $line = readline(); $data = explode($line, " "); $heights[$i]['g'] = $data[0]; $heights[$i]['h'] = $data[1]; $heights[$i]['o'] = $i; } asort($heights['h']); for($i= 1; $i<=$n; $i++) echo $heights[$i]['o'];
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Error: Call to undefined function readline() in /in/XiDVS:5 Stack trace: #0 {main} thrown in /in/XiDVS on line 5
Process exited with code 255.
Output for 5.4.0 - 5.6.28
Fatal error: Call to undefined function readline() in /in/XiDVS on line 5
Process exited with code 255.