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<?php $str = 'a b c d a c a d 你 我 他们 我'; $a = explode(' ', $str); var_dump(array_count_values($a));
Output for git.master, git.master_jit, rfc.property-hooks
array(7) { ["a"]=> int(3) ["b"]=> int(1) ["c"]=> int(2) ["d"]=> int(2) ["你"]=> int(1) ["我"]=> int(2) ["他们"]=> int(1) }

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