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<?php $string = "PHP What is PHP"; do { $result[] = $string; $string = preg_replace('/\s+\S+$/', '', $string, 1, $count); } while ($count); var_export($result);
Output for git.master, git.master_jit
array ( 0 => 'PHP What is PHP', 1 => 'PHP What is', 2 => 'PHP What', 3 => 'PHP', )

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