Creating an associative array in PHP

I am a beginner to Programming; I am stuck while creating an associative array from an existing associative array

<?php
    $arr = array( 
            array(
                "question"=>"I get irritated easily.",
                "answer"=>"1"
            ),
            array(
                "question"=>"I spend time reflecting on things.",
                "answer"=>"1"
            ),
            array(
                "question"=>"I am quiet around strangers.",
                "answer"=>"1"
            ),
            array(
                "question"=>"I make people feel at ease.",
                "answer"=>"1"
            ),
            array(
                "question"=>"I am exacting in my work.",
                "answer"=>"1"
            ),
            array(
                "question"=>"I often feel blue.",
                "answer"=>"3"
            ),
            array(
                "question"=>"I am full of ideas.",
                "answer"=>"4"
            )
        );
     
     
     $answer_array = array();
     foreach( $arr as $questions ) {
       $answer_array['text']=$questions['answer'];
     }
     print_r( $answer_array );
?>

I want the $answer_array in the following format:
$answer_array("text"=>"1 , 1 , 1 , 1 , 1 ,3 , 4")

But I am not getting the correct answer as it displays in the following manner:

Array
(
    [text] => 4
)

This is because it overwrites all the other values while iterating and only stores the last value. I need to store all the value as I have mentioned above. Kindly suggest where am I going wrong.

>Solution :

You can try to concat the values by changing

 $answer_array['text']=$questions['answer'];

to

if(isset($answer_array['text'])){
  $answer_array['text'] .= ', '. $questions['answer'] ;
} else {
 $answer_array['text'] = $questions['answer'];
}