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<?php $a = ['aa' => 4, 'cc' => 6]; $b = ['cc' => 6, 'aa' => 4]; var_dump( array_keys( $a ) );
Output for git.master, git.master_jit, rfc.property-hooks
array(2) { [0]=> string(2) "aa" [1]=> string(2) "cc" }

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