如何讓我的PHP數組數據保持？

Question

當我查詢foreach循環內的數據時，它可以正常工作，但是會爲循環中的每一遍都重複。我嘗試在循環外的任何地方var_dump，並且數據不在那裏。爲什麼我的數據不會保存在forEach循環之外？

<?php 


    $old_array = [10-2, 13=>"3452", 4=>"Green", 
5=>"Green", 6=>"Blue", "green"=>"green", 
"two"=>"green" ,"2"=>"green" , "rulebreak" =>"GrEeN", 
"ninja"=>" Green ", ["blue" => "green", "green"=>"green", 2 => "itsGreen"] ]; 

$newArray = array(); 

function filter_Green($array) { 



$find = "green"; 
$replace = "not green"; 

/* Same result as using str_replace on an array, but does so recursively for multi-dimensional arrays */ 
/* found here: 

if (!is_array($array)) { 
    /* Used ireplace so that searches can be case insensitive */ 
    return str_ireplace($find, $replace, $array); 
} 


foreach ($array as $key => $value) { 

    $newArray[$key] = $value; 
    if ($key == "green") { 
    $newArray[$key] = "not green"; 
    } 
    if ($value == "green") { 
    $newArray[$value] = "not green"; 
    } 


} 

return $newArray; 

} 

filter_Green($old_array); 

    var_dump($newArray); 
?> 

後市展望：當我運行的功能，應該用「不綠色」替代「綠色」的所有實例，並保存成$newArray。我有返回$ newArray，但即使如此，它似乎沒有匹配的價值被保存到newArray，因此，我爲什麼要做var_dump來檢查它是否工作（它似乎不是）

結果：因爲它被設置，我得到一個空數組返回給我......如果我將var_dump（$ newArray）移動到foreach循環內，但它會爲每次傳遞複製數據，似乎會有所作用。

Answer 1

，如果你想的var_dump $newArray出側的功能，那麼你應該在你的函數聲明$newArray作爲global

<?php 


$old_array = [10-2, 13=>"3452", 4=>"Green", 5=>"Green", 6=>"Blue", "green"=>"green", "two"=>"green" ,"2"=>"green" , "rulebreak" =>"GrEeN", "ninja"=>" Green ", ["blue" => "green", "green"=>"green", 2 => "itsGreen"] ]; 

$newArray = array(); 

function filter_Green($array) { 
global $newArray; 


$find = "green"; 
$replace = "not green"; 

/* Same result as using str_replace on an array, but does so recursively for multi-dimensional arrays */ 

if (!is_array($array)) { 
    /* Used ireplace so that searches can be case insensitive */ 
    return str_ireplace($find, $replace, $array); 
} 


foreach ($array as $key => $value) { 

    $newArray[$key] = $value; 
    if ($key == "green") { 
    $newArray[$key] = "not green"; 
    } 
    if ($value == "green") { 
    $newArray[$value] = "not green"; 
    } 


} 

return $newArray; 

} 

filter_Green($old_array); 
var_dump($newArray); 

?> 

但不是在函數聲明global，使用由filter_Green($old_array);返回值，如下

$result = filter_Green($old_array); 
var_dump($result);