JSON arrays using PHP - php

Question

I'm having an array "pollAnswers" which displays:
Array
(
[0] => Sachin
[1] => Dhoni
)
in PHP and I want it to display as:
"pollAnswers":[
{"pollAnswersID":0, "pollAnswer":"Sachin"},
{"pollAnswersID":1, "pollAnswer":"Dhoni"}
]
in JSON output.
I've tried using array_fill_keys and array_flip but that's not solution for this. It seems I need to split the array_keys and array_values and then do some concatenation to get this, but I'm stuck here!

Answer 1

Online check link
Try this
$arr = array("Sachin", "Dhoni");
$sub_arr = array();
$final = array();
foreach($arr as $key => $val){
$sub_arr['pollAnswersId'] = $key;
$sub_arr['pollAnswer'] = $val;
$sub_final[] = $sub_arr;
}
$final['pollAnswers'] = $sub_final;
echo json_encode($final);
result
{"pollAnswers":[
{"pollAnswersId":0,"pollAnswer":"Sachin"},
{"pollAnswersId":1,"pollAnswer":"Dhoni"}
]}

Answer 2

You can try with array_map.
$Array = array('Sachin', 'Dhoni');
$new = array_map(function($v, $k) {
return ['pollAnswersId' => $k, 'pollAnswer' => $v]; // return the sub-array
}, $Array, array_keys($Array)); // Pass the values & keys
var_dump(json_encode(array("pollAnswers" => $new)));
Output
"{"pollAnswers":[
{"pollAnswersId":0,"pollAnswer":"Sachin"},
{"pollAnswersId":1,"pollAnswer":"Dhoni"}
]}"
For older versions of PHP.
return array('pollAnswersId' => $k, 'pollAnswer' => $v);
Fiddle

Answer 3

<?php
$answerArray = [];
foreach($yourArray as $key => $r)
$answerArray[] = ['pollAnswersId' => $key, 'pollAnswer' => $r];
echo json_encode($answerArray);
Here you go.

Answer 4

Try this:
$givenArray = array("Sachin","Dhoni");
$answerArray = [];
foreach($givenArray as $key => $r)
$answerArray[] = ['pollAnswersId' => $key, 'pollAnswer' => $r];
echo $out = json_encode(array('pollAnswers' => $answerArray));