php数组操作如何实现键名比较与差集、交集赋值
php数组操作如何实现键名比较与差集、交集赋值呢？下面是小编给大家提供的实现方法，大家可以参考阅读，更多详情请关注应届毕业生考试网。
该实例主要实现对数组的各种常见操作。如对键名比较计算数组的差集，计算差集，给指定数组中插入一个元素，反转数组与交集赋值新的数组等。
代码如下:
/pic/p>
function key_compare_func($key1,$key2)
{
if($key1==$key2) /pic/p>
return 0; /pic/p>
else if($key1>$key2) /pic/p>
return 1; /pic/p>
else /pic/p>
return -1; /pic/p>
}
/pic/p>
$array1=array('blue'=>1,'red'=>2,'green'=>3,'purple'=>4);
$array2=array('green'=>5,'blue'=>6,'yellow'=>7,'cyan'=>8);
/pic/p>
$result=var_dump(array_diff_ukey($array1,$array2,'key_compare_func'));
print_r($result);
/pic/p>
$array1=array("a"=>"green","red","blue","red"); /pic/p>
$array2=array("b"=>"green","yellow","red"); /pic/p>
$result=array_diff($array1,$array2); /pic/p>
print_r($result); /pic/p>
/pic/p>
$result=array_fill(5,6,'banana'); /pic/p>
print_r($result); /pic/p>
/pic/p>
function odd($var)
{
return($var%2==1); /pic/p>
}
function even($var)
{
return($var%2==0); /pic/p>
}
/pic/p>
$array1=array("a"=>1,"b"=>2,"c"=>3,"d"=>4,"e"=>5);
$array2=array(6,7,8,9,10,11,12);
echo "过滤奇数:n";
print_r(array_filter($array1,"odd")); /pic/p>
echo "过滤偶数:n";
print_r(array_filter($array2,"even")); /pic/p>
/pic/p>
$trans=array("a"=>1,"b"=>2,"c"=>3); /pic/p>
$result=array_flip($trans); /pic/p>
print_r($result); /pic/p>
/pic/p>
$array1=array("a"=>"green","b"=>"brown","c"=>"blue","red");
$array2=array("a"=>"green","yellow","red");
$result_array=array_intersect_assoc($array1,$array2); /pic/p>
print_r($result_array); /pic/p>
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