3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $hotels = [ ['Cala', 3, 8.7, 6000], ['Ocean', 3, 8.2, 6150], ['Orchid', 3, 8.0, 7200], ['Ya', 4, 8.3, 6950], ['Chaba', 3, 8.2, 7120], ]; $top = [ 'Ocean', 'Ya', 'Chaba', ]; for ( $i=0; $i<count($hotels); $i++ ) { $hotels[$i][4] = 0; } //$starCoefOptions = range(0.02, 5, 0.02); //$ratingCoefOptions = range(50, 10000, 50); $starCoefOptions = array(0.2, 0.3, 0.4, 0.5); $ratingCoefOptions = array(1000, 2000, 3000, 4000); foreach ( $starCoefOptions as $starCoef ) { foreach ( $ratingCoefOptions as $ratingCoef ) { $topGenerated = buildTop($hotels, $starCoef, $ratingCoef); $topGenerated = array_slice($topGenerated, 0, count($top)); var_dump($topGenerated); if ( $topGenerated === $top ) { echo '$starCoef = '.$starCoef."\r\n"; echo '$ratingCoef = '.$ratingCoef."\r\n"; echo "\r\n"; } } } function buildTop($hotels, $starCoef, $ratingCoef) { for ( $i=0; $i<count($hotels); $i++ ) { for ( $j=$i+1; $j<count($hotels); $j++ ) { $starDifference = $hotels[$i][1]-$hotels[$j][1]; $ratingToCompensate = $starDifference*$starCoef; $rating = $hotels[$i][2]+$ratingToCompensate; $ratingDifference = ($rating-$hotels[$j][2])*10; $priceToCompensate = $ratingDifference*$ratingCoef; $price = round($hotels[$i][3]-$priceToCompensate); if ( $price < $hotels[$j][3] ) { $hotels[$i][4]++; } else { $hotels[$j][4]++; } } } usort($hotels, function($hotelA, $hotelB){ return $hotelB[4]-$hotelA[4]; }); return array_map(function($hotel){ return $hotel[0]; }, $hotels); }
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(4) "Cala" [1]=> string(2) "Ya" [2]=> string(5) "Ocean" } array(3) { [0]=> string(2) "Ya" [1]=> string(4) "Cala" [2]=> string(5) "Ocean" } array(3) { [0]=> string(2) "Ya" [1]=> string(4) "Cala" [2]=> string(5) "Ocean" } array(3) { [0]=> string(2) "Ya" [1]=> string(4) "Cala" [2]=> string(5) "Ocean" } array(3) { [0]=> string(2) "Ya" [1]=> string(4) "Cala" [2]=> string(5) "Ocean" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/XGpq4 on line 3
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 '[' in /in/XGpq4 on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/XGpq4 on line 3
Process exited with code 255.