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run code in 150+ php & hhvm versions
Bugs & Features
<?php // attiva alcuni errori, definendo prima un array misto con elementi non numerici echo "vector a\n"; $a = array(2,3,"foo",5.5,43.3,21.11); print_r($a); // genera il secondo array, generando un avviso echo "----\nvector b - a warning (b = log(PI) * a)\n"; $b = scale_by_log($a, M_PI); print_r($b); // questo è il problema, passiamo una stringa al posto di un array echo "----\nvector c - an error\n"; $c = scale_by_log("not array",2.3); var_dump($c); // errore critico, il log di zero o di un numero negativo non è definito echo "----\nvector d - fatal error\n"; $d = scale_by_log($a, -2.5); ?>
Output for 7.0.0 - 7.1.0
vector a Array ( [0] => 2 [1] => 3 [2] => foo [3] => 5.5 [4] => 43.3 [5] => 21.11 ) ---- vector b - a warning (b = log(PI) * a) Fatal error: Uncaught Error: Call to undefined function scale_by_log() in /in/bgAK7:11 Stack trace: #0 {main} thrown in /in/bgAK7 on line 11
Process exited with code 255.
Output for 5.0.0 - 5.6.28, hhvm-3.12.0
vector a Array ( [0] => 2 [1] => 3 [2] => foo [3] => 5.5 [4] => 43.3 [5] => 21.11 ) ---- vector b - a warning (b = log(PI) * a) Fatal error: Call to undefined function scale_by_log() in /in/bgAK7 on line 11
Process exited with code 255.
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.5 - 4.4.9
vector a Array ( [0] => 2 [1] => 3 [2] => foo [3] => 5.5 [4] => 43.3 [5] => 21.11 ) ---- vector b - a warning (b = log(PI) * a) Fatal error: Call to undefined function: scale_by_log() in /in/bgAK7 on line 11
Process exited with code 255.
Output for 4.3.2 - 4.4.4
vector a Array ( [0] => 2 [1] => 3 [2] => foo [3] => 5.5 [4] => 43.3 [5] => 21.11 ) ---- vector b - a warning (b = log(PI) * a) Fatal error: Call to undefined function: scale_by_log() in /in/bgAK7 on line 11
Process exited with code 255.
Output for 4.3.0 - 4.3.1
vector a Array ( [0] => 2 [1] => 3 [2] => foo [3] => 5.5 [4] => 43.3 [5] => 21.11 ) ---- vector b - a warning (b = log(PI) * a) Fatal error: Call to undefined function: scale_by_log() in /in/bgAK7 on line 11