我有一个问题。 有一个重命名数组键的脚本。
现在我想在需要时在子级别数组中执行此操作。
现状
我现有的代码是:
///######## IF THE ORIGINAL KEY HAS BEEN SET
if(isset($this->PreparedData[$key]) === true){
///######## ADD THE DATA TO THE PREPARED DATA VARIABLE
$this->PreparedData[$value] = $this->PreparedData[$key];
///######## UNSET THE ORIGINAL KEY
unset($this->PreparedData[$key]);
}
但我希望代码能够动态设置以下内容:
///######## IF THE ORIGINAL KEY HAS BEEN SET
if(isset($this->PreparedData[$subKey1][$key]) === true){
///######## ADD THE DATA TO THE PREPARED DATA VARIABLE
$this->PreparedData[$subKey1][$value] =$this->PreparedData[$subKey1][$key];
///######## UNSET THE ORIGINAL KEY
unset($this->PreparedData[$subKey1][$key]);
}
问题
但我想动态地这样做:
所以它可能是:
$this->PreparedData[$subKey1][$key]
但是:
$this->PreparedData[$subKey1][$subKey2][$key]
但是:
$this->PreparedData[$subKey1][$subKey2][$subKey3][$key]
这是在数组的手中
期望的情况
所以我可以设置:
MethodName('wheels', array('car', 'mustang'));
这意味着:
$this->PreparedData['car']['mustang']['wheels']
我唯一的问题..是......怎么办呢? 因为我也希望能够致电:
MethodName('wheels');
含义:
$this->PreparedData['wheels']
谢谢!!
解决方案是(通过splash58):
function MethodName($key, $path = array()) {
global $array;
$p = &$array; // point to array
foreach($path as $step) // walk trough path to needed level
$p = &$p[$step];
return $p[$key]; //take value
}
$array = array( // test array
'wheels'=> 'wheels1',
'car' => array(
'mustang' => array(
'wheels'=> 'wheels2')));
echo MethodName('wheels', array('car', 'mustang')) . "\n"; // wheels2
echo MethodName('wheels'); // wheels1
答案 0 :(得分:1)
将此移至您的环境
function MethodName($key, $path = array()) {
global $array;
$p = &$array; // point to array
foreach($path as $step) // walk trough path to needed level
$p = &$p[$step];
return $p[$key]; //take value
}
$array = array( // test array
'wheels'=> 'wheels1',
'car' => array(
'mustang' => array(
'wheels'=> 'wheels2')));
echo MethodName('wheels', array('car', 'mustang')) . "\n"; // wheels2
echo MethodName('wheels'); // wheels1
答案 1 :(得分:0)
声明方法时,只需让它具有数组参数的默认值即可。做这样的事情:
function MethodName($valToInsert, $array = array())
{
$arr1 = array();
foreach($array as $key=>$value)
{
$arr1 = arr1[$value];
}
$final_array = $arr1[$valToInsert];
return $final_array;
}
答案 2 :(得分:0)
对于这个问题,我使用以下函数:
function traverse($array, $path){
foreach ($path as $key) {
if(isset($array[$key]))
$array = &$array[$key];
else return null;
}
return $array;
}
使用它非常简单:
$array = array( // test array
'wheels'=> 'wheels1',
'car' => array(
'mustang' => array(
'wheels'=> 'wheels2')
)
);
traverse($array, array('car', 'mustang', 'wheels')); // will return 'wheels' if path exists 'null' if not
我个人这样使用它:
$array = array( // test array
'wheels'=> 'wheels1',
'car' => array(
'mustang' => array(
'wheels'=> 'wheels2')
)
);
traverse($array, 'car.mustang.wheels');
function traverse($array, $path){
if(!is_array($path))
$path = explode(".", $path);
foreach ($path as $key) {
if(isset($array[$key]))
$array = &$array[$key];
else return null;
}
return $array;
}