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php二位数组获取重复元素

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Release： 2016-06-02 11:31:13
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php数组 

<code>    $arr = array(        array('0001','0002'),        array('0001','0002','0003'),        array('0001','0002','0003','0005'),        array('0001','0002','1003','0005'),    );</code>
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希望得到结果，获取重复元素
$arr = array(‘0001’，‘0002’);

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php 数组
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