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.

CodePudding user response：

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'];
}

CodePudding user response：

You could try using array_map to get the answers to every question.

Then you could use implode to join the strings by a delimiter, in this case a ",":

     $answer_array = array(
         // Implode joins the strings
         'text'=>implode(
             // Replace this comma by another delimiter if you like
             ',',
             // Array_map applies a function to every element in a array
             array_map(
                 // Define a function that gets the answer to each question
                 fn($arr)=>$arr["answer"],
                 $arr
             )
         )
     );
     print_r( $answer_array );

Attempt This Online

CodePudding user response：

You can use array_column function

// Enter your code here, enjoy!
$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"
            )
        );
        
        
        print_r(array_column($arr, 'answer'));

https://onlinephp.io/c/51126