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<?php $string = "Hello, I don't know who I \"am\" but I know who you are, but I don't know where I am"; var_export(array_count_values(str_word_count($string, 1)));
Output for git.master, git.master_jit, rfc.property-hooks
array ( 'Hello' => 1, 'I' => 5, 'don\'t' => 2, 'know' => 3, 'who' => 2, 'am' => 2, 'but' => 2, 'you' => 1, 'are' => 1, 'where' => 1, )

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