如何使我的php数组数据持久化？
提问于 2016-05-18 01:52:39
当我在foreach循环中查询数据时，它可以工作，但在循环中的每一次传递中都会重复。我尝试在循环之外的任何其他地方使用var_dump，而数据却不在那里。为什么我的数据不存在于forEach循环之外？
<?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($newArray);
?>期望:当我运行这个函数时，它应该将"green“的所有实例替换为"not”，并将这些实例保存到$newArray中。我让它返回$newArray，但即使这样，它似乎也与将值保存到newArray中的情况不匹配，因此我要做var_dump来检查它是否工作(似乎不起作用)。
结果:在设置过程中，如果我将var_dump($newArray)移动到foreach循环中，那么返回给var_dump的空数组似乎有点工作，但这会重复每次传递的数据。
回答 1
Stack Overflow用户
回答已采纳
发布于 2016-05-18 02:07:09
如果要将var_dump $newArray放在函数的一边，则应在函数中声明$newArray为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($newArray);
?>但是，不要在函数中声明global，而是使用filter_Green($old_array);返回的值，如下所示
$result = filter_Green($old_array);
var_dump($result);页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/37296078
复制
腾讯云开发者
