PHP - 变量之外的数组名称

Is it possible to use php variable as a part of an array name. like this my arrays are Fday1, Fday2....but i cant go with the foreach keys beacause there are different counts of values for each array

$FdayArray = "Fday".$FdayKey;
array_push($FdayArray, $forecast);

the FdayKey would be a number between 1-9 How do I do this correctly?

You are looking for the variable variables feature of php.

Sometimes it is convenient to be able to have variable variable names. That is, a variable name which can be set and used dynamically. It takes the value of a variable and treats that as the name of a variable

You would use

array_push($$FdayArray, $forecast);

Instead of maintaining different array for each $FdayKey, you can have an associative array, which has internal arrays corresponds to each $FdayKey

The array can look like:

$FdayArray = [
  '1' => [],
  '2' => [],
  '3' => [],
  '4' => [],
  '5' => [],
  '6' => [],
  '7' => [],
  '8' => [],
  '9' => []
];

When you need to push to the array, just use the $FdayKey as a index to get the relevant array.

So you can push as:

array_push($FdayArray[$FdayKey], $forecast);