1 array_filter() — 用回调函数过滤数组中的单元:
例子:
<?php
function odd($var)
{
return($var % 2 == 1);
}
function even($var)
{
return($var % 2 == 0);
}
$array1 = array("a"=>1, "b"=>2, "c"=>3, "d"=>4, "e"=>5);
$array2 = array(6, 7, 8, 9, 10, 11, 12);
echo "Odd :\n";
print_r(array_filter($array1, "odd"));
echo "Even:\n";
print_r(array_filter($array2, "even"));
?>
输出:
Odd :Array( [a] => 1 [c] => 3 [e] => 5)Even:Array( [0] => 6 [2] => 8 [4] => 10 [6] => 12)
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