PHP的array_combine可以用来创建一个带有(稀疏）数字键的关联数组吗? - Can PHP's array_combine be used to create an associative array with (sparse) numeric keys?

Can PHP's array_combine be used to create an associative array with (sparse) numeric keys?

我使用preg_match在网页中查找键和值。有些键是数字，如101357，但大多数是字符串。当我使用 array_combine 创建具有这些键和值的数组时，它会将数字键转换为从键 0 开始的有序数组元素：

发现：

"ABC"    => "Value1",
"101397" => "Value2",
"DEF"    => "Value3",
"401995" => "Value4"

所以$keys = array（"

ABC"，"101397"，"DEF"，"401995"）和 $vals = array（"Value1",...）

print_r(array_combine($keys, $vals)) produces:
"ABC" => "Value1"
0     => "Value2"
"DEF" => "Value3"
1     => "Value4"

所以我丢失了键的值。在我找到一个更优雅的解决方案（如果可能的话）之前，我会把array_combine展开成一个

foreach($keys as $idx=>$key) 
{
    $result[$key] = $vals[$val];
}

我得到的结果和你不一样：

$array = array("ABC" => "Value1",
"101397" => "Value2",
"DEF" => "Value3",
"401995" => "Value4");
$keys = array_keys($array);
$values = array_values($array);
print_r(array_combine($keys, $values));

给：

Array ( [ABC] => Value1 [101397] => Value2 [DEF] => Value3 [401995] => Value4 )

显示$keys和$values的值：

print_r($keys);
print_r($values);
Array ( [0] => ABC [1] => 101397 [2] => DEF [3] => 401995 )
Array ( [0] => Value1 [1] => Value2 [2] => Value3 [3] => Value4 )

即使尽可能使用非字符串键也会给出相同的结果。

$array = array("ABC" => "Value1",
101397 => "Value2",
"DEF"  => "Value3",
401995 => "Value4");
$keys = array_keys($array);
$values = array_values($array);
print_r(array_combine($keys, $values));
Array ( [ABC] => Value1 [101397] => Value2 [DEF] => Value3 [401995] => Value4 )