Separate multidimensional array into separate arrays - php

Question

I am trying to get my head around arrays.
The arrays should look like this:
$questions[$a] => array( [0] => No, comment1
[1] => Yes, comment2
[2] => No, comment3 )
$answer[$a] => array( [0] => No
[1] => Yes
[3] => No )
$comment[$a] => array( [0] => comment1
[1] => comment2
[3] => comment3 )
=========================================================================
SECOND EDIT: Need to execute this in the loop to create a third array -
if($answer[$a] == "Yes") { $display[$a] = "style='display:none'";
} else { $display[$a] = "style='display:block'"; }
This is what i have: (28th for minitech)
while ($a > $count)
{
if($count > 11) {
foreach($questions as $q) {
list($answer, $comments[]) = explode(',', $q);
if($answer === "Yes") {
$display[$a] = "style='display:none'";
} else {
$display[$a] = "style='display:block'";
}
$answers[] = $answer;
}
}
$a++;
}

Answer 1

If they are actually strings, explode works:
$answers = array();
$comments = array();
$display = array();
foreach(array_slice($questions, 11) as $question) {
list($answer, $comments[]) = explode(',', $question);
$display[] = $answer === 'Yes' ? 'style="display: none"' : 'style="display: block"';
$answers[] = $answer;
}
Here’s a demo!

Answer 2

Change your while loop to this
while ...
{
$parts = explode(',', $questions[$a]);
$answer[$a][] = trim($parts[0]);
$comment[$a][] = trim($parts[1]);
}
In your original code you were overwriting the $answer[$a] and $comment[$a] each time, not appending to the end of an array

Answer 3

$questions[$a] = array('Q1?' => 'A1', 'Q2?' => 'A2', 'Q3?' => 'A3');
foreach($questions[$a] as $key => $value)
{
$comment[$a][] = $key;
$answer[$a][] = $value;
}

Answer 4

This should work.
foreach ($questions[$a] as $key=>$value){
$temp = explode(',',$value);
$answer[$key] = $temp[0];
$comment[$key] = $temp[1];
}
$key will have 0,1,2 respectively. $value will have the values for each $question[$a](No,Comment1 ....)

Answer 5

Can't think of a funky one-liner, but this should do it:
foreach ($questions as $a => $entries) {
foreach ($entries as $k => $entry) {
$parts = array_map('trim', explode(',', $entry));
$answer[$a][$k] = $parts[0];
$comment[$a][$k] = $parts[1];
}
}

Answer 6

$questions = array( 0 => 'No,comment1',1 => 'Yes,comment2',2 => 'No,comment3' );
foreach($questions as $question)
{
$parts = explode(",",$question);
$answer[] = $parts[0];
$comment[] = $parts[1];
}
echo "<pre>";
print_r($answer);
print_r($comment);

Answer 7

Here is the right answer
foreach($questions as $key => $question){
foreach($question as $q => $data){
$data= explode(',',$data);
$comments[$key][$q] = $data[0];
$answer[$key][$q] = $data[1];
}
}

Answer 8

If the values in $questions are comma-separated strings you could use an array_walk function to populate your $answer and $comment arrays
$question = array(...); //array storing values as described
$answer = array();
$comment = array();
array_walk($question, function ($value, $key) use ($answer,$comment) {
$value_array = explode(',', $value);
$answer[$key] = $value_array[0];
$comment[$key] = $value_array[1];
});
Note that this is shown using an anonymous function (closure) which requires PHP >= 5.3.0. If you had a lower version of PHP, you would need to declare a named function, and declare $answer and $comment as globals in the function. I think this is a hacky approach (using globals like this) so if I was using PHP < 5.3 I would probably just use a foreach loop like other answers to your question propose.
Functions like array_walk, array_filter and similar functions where callbacks are used are often great places to leverage the flexibility provided by anonymous functions.