组合2个php数组？

Question

我该如何结合这两个阵列？

$array1 = array("gif" => "gif", "jpg" => "jpeg", "jpeg" => "jpeg", "png" =>"png"); 
$array2 = array("gif" => "0", "jpg" => "90", "jpeg" => "90", "png" => "8"); 

我试图

$array1 = array("gif" => "gif" => "0", "jpg" => "jpeg" => "90", "jpeg" => "jpeg" => "90", "png" =>"png" => "8"); 

但是，当然，它没有工作，所以任何帮助吗？

Answer 1

这似乎更有意义：

$arr = array("gif" => array("extension" => "gif", "size" => "90"), 
      "jpg" => array("extension" => "jpeg", "size" => "120") 

       ... 
      ); 

echo "Extension: " . $arr['gif']['extension'] . " Size or whatever: " . $arr['gif']['size']; 

要遍历它：

foreach($arr as $key => $val) { 
    echo "Image Type: $key, Extension: " . $val['extension'] . ", Size: " . $val['size']; 
} 

Answer 2

对于每个键您有两个值。有多个值创建一个子阵列的每个键：

$ar1 = array('key' => array('key1','key2')); 

Answer 3

为了扩大我以前的答案，您使用的是paralell阵列的更好：

$validTypes = array("gif" => "gif", "jpg" => "jpeg", "jpeg" => "jpeg", "png" => "png"); 
$quality = array("gif" => 0, "jpg" => 90, "jpeg" => 90, "png" => "png"); 
if (!array_key_exists($image_type, $validTypes)) { 
    trigger_error("Not a valid image type", E_USER_WARNING); 
    return NULL; 
} 

// ... 

$inFunc = "imagecreatefrom" . $validTypes[$image_type]; 
$outFunc = "image" . $validTypes[$image_type]; 

// ... 

$outFunc($image, $source_file, $quality[$image_type]); 

但是karim的回答也很好。只是一个偏好问题。

Answer 4

不知道你想如何“结合”他们。 IM将假设你希望从第一阵列中的每个键映射到一个值，在第二

foreach($array1 as $k=>$v) 
{ 
    $a3[$k] = $array2[$v] 
} 

给你

$a3 = array('gif'=>'0', 'jpg'=>'90', 'jpeg'=>'90', 'png'=>'8'); 

但是，这是一样的数组2。 也许

foreach($array1 as $k=>$v) 
{ 
    $a3[$k] = array($array1[$k],$array2[$k]); 
} 

给

$a3 = array('gif'=>array('gif',0),'jpg'=>array('jpeg',90)...) 

Answer 5

我很惊讶，没有一个答案是指你这基本上可以被描述为"everything you ever wanted to know about PHP arrays but were afraid to ask"

Answer 6

$array1 = array("gif" => "gif", "jpg" => "jpeg", "jpeg" => "jpeg", "png" =>"png"); 
$array2 = array("gif" => "0", "jpg" => "90", "jpeg" => "90", "png" => "8"); 
$finalarray = (array_merge_recursive($array1,$array2)); 

的$ finalarray结构如下是：

Array 
(
[gif] => Array 
    (
     [0] => gif 
     [1] => 0 
    ) 

[jpg] => Array 
    (
     [0] => jpeg 
     [1] => 90 
    ) 

[jpeg] => Array 
    (
     [0] => jpeg 
     [1] => 90 
    ) 

[png] => Array 
    (
     [0] => png 
     [1] => 8 
    ) 
)