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<?php $a = array( 'station_type', 'max', 'starts_with', 'lang', 'transpost_type' ); $b = array('a' => 1, 'b' => 2, 'c' => 3); var_dump(count(array_diff_key($a, $b)));
Output for git.master, git.master_jit, rfc.property-hooks
int(5)

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