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<?php $match = 'today'; $n = 2; for ($pos = strlen($match) - $n; $pos >= 0; --$pos) { $nGrams[] = substr($match, $pos, $n); } var_export($nGrams);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => 'ay', 1 => 'da', 2 => 'od', 3 => 'to', )

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