如何在php中设置动态arrray名称

hi i am trying to use dynamic array name . but when i run this code i get the error $marker is undefined .

嗨，我正在尝试使用动态数组名称。但是，当我运行此代码时，我得到错误$ marker未定义。

 if (isset($arr)) {
               foreach ($arr as $key => $value) {

                  $marker.$key = array();

                   $marker.$key ['position'] = $value['lat'] . ',' . $value['long'];
                   $marker.$key ['draggable'] = 'TRUE';
                   $marker.$key ['ondragend'] = "test(this.getPosition().lat(),this.getPosition().lng())";

                   $this->ci->googlemaps->add_marker($marker.$key);
                   $i++;
                  }

           }

how can i create dynamic array name ????

我该如何创建动态数组名称????

3 个解决方案

#1

Read The Fine Manual. The dot operator in PHP is completely unrelated to the dot operator in Javascript and similar languages - it does string concatenation. I don't quite understand what it is you're trying to do, but I'm fairly sure string concatenation is not it.

阅读精细手册。 PHP中的点运算符与Javascript和类似语言中的点运算符完全无关 - 它执行字符串连接。我不太明白你想要做什么，但我相当确定字符串连接不是它。

To clarify, what this does:

澄清一下，这是做什么的：

$marker.$key ['draggable'] = 'TRUE';

...is this;

...这是;

get the value in $marker, interpret it as a string
获取$ marker中的值，将其解释为字符串
get the value in $key, interpret it as a string
获取$ key中的值，将其解释为字符串
concatenate $marker and $string
连接$ marker和$ string
interpret the resulting string as an array, and set the element at 'draggable' to the string (!) 'TRUE'. I'm not even sure what this does - string do allow for array-style indexing (which references individual characters), but I have no idea what non-integer indexes would yield.
将结果字符串解释为数组，并将'draggable'元素设置为字符串（！）'TRUE'。我甚至不确定这是做什么的 - 字符串允许数组样式索引（引用单个字符），但我不知道非整数索引会产生什么。

#2

Try this, when you do your concatenation PHP sees only $key to be an array, and concatenates the wrong way. Anyway, where is $marker defined??

试试这个，当你进行连接时，PHP只看到$ key是一个数组，并以错误的方式连接。无论如何，$ marker定义在哪里？

if (isset($arr)) {
               foreach ($arr as $key => $value) {
                  $myarray = $marker.$key;
                  $myarray = array();

                   $myarray['position'] = $value['lat'] . ',' . $value['long'];
                   $myarray['draggable'] = 'TRUE';
                   $myarray['ondragend'] = "test(this.getPosition().lat(),this.getPosition().lng())";

                   $this->ci->googlemaps->add_marker($myarray);
                   $i++;
                  }
           }

#3

Dynamic array names in Php can be done like this

Php中的动态数组名称可以像这样完成

foreach($arr as $key => $value) {
$myarray[$key] = $value;
}

Yet, you can also do like this, to set the array-variable

然而，你也可以这样做，设置数组变量

foreach($arr as $key => $value) {
${$key}[$key] = $value;
}

#1