《PHP-运用回调函数实现数组的筛选》

 1, "222"=>2, "333"=>3, "444"=>4, "555"=>5); $nums2 = $nums1; echo "
"; echo "Odd :\n"; //回调函数，如果返回true则将$array1中的数据再赋给原数组，键保持不变 print_r(array_filter($nums1, "odd")); echo "
        

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"; echo "
       

        
"; echo "Even:\n"; print_r(array_filter($nums2, "even")); echo "
        

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"; ?>