比较两个PHP数组一般

Question

假设我们有：

$arr1 = array("a", "b");
$arr2 = array("a", "b");

并且数组始终排序。这是真的吗？

if ( $arr1 === $arr2 )
{
     echo "condition met";
}

Answer 1

您可以将两个（和更多）数组与array_diff()进行比较，并在您的情况下查找一个空数组。

$diff = array_diff($arr1, $arr2);
if(empty($diff)) {
    echo "condition met";
}

Answer 2

($arr1 == $arr2); // TRUE when both  have the same key/value pairs.
($arr1 === $arr2); // TRUE when both have the same key/value pairs in the same order and of the same types.