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run code in 150+ php & hhvm versions
Bugs & Features
<?php $str1 = "Samsung Television 21 Inches LED BH005DE"; $str2 = "Samsung 21 Inch LED TV"; //synonyms: $syns = [ 'TV' => ['TV', 'Television'], 'Inch' => ['Inch', 'Inches'] ]; //replace: $str1 = array_reduce(array_keys($syns), function($c, $x) use ($syns) { return $c = preg_replace('/\b'.join('\b|\b', $syns[$x]).'\b/', $x, $c); }, $str1); //now, str1 looks like "Samsung TV 21 Inch LED BH005DE" $str2 = array_reduce(array_keys($syns), function($c, $x) use ($syns) { return $c = preg_replace('/\b'.join('\b|\b', $syns[$x]).'\b/', $x, $c); }, $str2); //now, str2 looks like "Samsung 21 Inch LED TV" $arr1 = explode(' ', $str1); $arr2 = explode(' ', $str2); var_dump(array_diff($arr1, $arr2));//['BH005DE']
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(1) { [5]=> string(7) "BH005DE" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/d7csn on line 6
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/d7csn on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/d7csn on line 6
Process exited with code 255.