使用数组中的值填充PHP list（）

Question

I have an array:

$arr = array('foo', 'bar', 'bash', 'monkey', 'badger');

I want to have the elements in that array appear as the variables in my list():

list($foo, $bar, $bash, $monkey, $badger) = $data;

Without actually specifying the variables, I tried;

list(implode(",$", $arr)) = $data; and
list(extract($arr)) = $data;

But they don't work, I get:

Fatal error: Can't use function return value in write context

Does anyone have any idea whether this is possible?

---

UPDATE: more context:

I am getting a CSV of data from an API, the first row is column names, each subsequent row is data. I want to build an associative array that looks like this:

$data[0]['colname1'] = 'col1data';
$data[0]['colname2'] = 'col2data';
$data[0]['colname3'] = 'col3data';
$data[1]['colname1'] = 'col1data';
$data[1]['colname2'] = 'col2data';
$data[1]['colname3'] = 'col3data';

Before I do that, however, I want to make sure I have all the columns I need. So, I build an array with the column names I require, run some checks to ensure the CSV does contain all the columns I need. Once thats done, the code looks somewhat like this (which is executed on a foreach() for each row of data in the CSV):

//$data is an array of data WITHOUT string indexes
list(   $col1,
    $col2,
    $col3,
    ...
    $col14
 ) = $data;

foreach($colNames AS $name)
{
    $newData[$i][$name] = $$name;
}
// Increemnt
$i++;

As I already HAVE an array of column name, I though it would save some time to use THAT in the list function, instead of explicitly putting in each variable name.

The data is cleaned and sanitised elsewhere.

Cheers,

Mike

Answer 1

You are trying to use a language construct in a manner in which it's not meant to be used. Use variable variables as Alvaro mentioned.

$arr = array('foo', 'bar', 'bash', 'monkey', 'badger');
foreach ($arr as $index => $key) {
    $$key = $data[$index];
}

or

$arr = array('foo', 'bar', 'bash', 'monkey', 'badger');
$result = array();
foreach ($arr as $index => $key) {
    $result[$key] = $data[$index];
}
extract($result);

In short, do not use "list", use arrays and associated arrays. Write helper functions to make your code clearer.