3v4l.org

run code in 300+ PHP versions simultaneously
<?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 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
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 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 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 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Fatal error: Call to undefined function readline() in /in/XiDVS on line 5
Process exited with code 255.

preferences:
249.03 ms | 402 KiB | 373 Q