$a = array( '1' => 'one', '2' => 'two', '3' => 'three', '4' => 'four', '5' => 'five', .... ); $b = array(2,5,4,1,3,.....); // 数组a的key顺序$c = array( '2' => 'two', '5' => 'five', '4' => 'four', '1' => 'one', '3' => 'three', .... );
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