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<?php $input = [ "Lincoln Crown", "Crown Court", "go holiday", "house fire", "John Hinton", "Hinton Jailed" ]; $output = []; while ($input) { $output[] = $words = array_shift($input); $input = preg_grep('~\b(?:\Q' . str_replace(' ', '\E|\Q', $words) . '\E)\b~', $input, PREG_GREP_INVERT); } var_export($output);
Output for 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array ( 0 => 'Lincoln Crown', 1 => 'go holiday', 2 => 'house fire', 3 => 'John Hinton', )
preferences:
139.69 ms | 408 KiB | 5 Q