3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function similarity($w1,$w2) { //return cosine similarity of w1 and w2 using formula in the //definition here: http://en.wikipedia.org/wiki/Cosine_similarity //get numerator: $numerator = 0; for($i = 0, $l = count($w1); $i < $l; $i++) $numerator += $w1[$i]*$w2[$i]; //get abs(w1) and abs(w2) $abs_w1 = 0; $abs_w2 = 0; for($i = 0, $l = count($w1); $i < $l; $i++) { $abs_w1 += $w1[$i]*$w1[$i]; $abs_w2 += $w2[$i]*$w2[$i]; } $abs_w1 = sqrt($abs_w1); $abs_w2 = sqrt($abs_w2); //make denominator: $denominator = $abs_w1*$abs_w2; return $numerator/$denominator; } echo similarity([1,2,3,4,5,6,7,8,9],[1,2,3,4,5,6,7,8,88]);
based on 4nSBI
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
0.66177137717935
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/diNTK on line 25
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/diNTK on line 25
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/diNTK on line 25
Process exited with code 255.