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《PHP-运用回调函数实现数组的筛选》

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Release: 2016-06-13 13:10:33
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《PHP---使用回调函数实现数组的筛选》

<div style="color:red">
<?php //如果是奇数则返回
function odd($var)
{
   return($var % 2 == 1);
}
//如果是偶数则返回
function even($var)
{
   return($var % 2 == 0);
}

$nums1 = array("111"=>1, "222"=>2, "333"=>3, "444"=>4, "555"=>5);
$nums2 = $nums1;

echo "<pre class="brush:php;toolbar:false">";
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 "
Copy after login
"; echo "
";
echo "Even:\n";
print_r(array_filter($nums2, "even"));
echo "
Copy after login
"; ?>

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