php looping through array to create multi dimensional array

Question

I am trying to loop though an existing multidimensional array grabbing certain values based on a key.

myarray = [];
for($i = 0; $i < count(exampleArray); $i++){
  $myarray = $exampleArray[$i]['wanted_field'];
}

This is only giving me one value.

The desired output will have a structure similar to this

myarray = ([0]=> 'apple' [1]=> 'orange'
           [0]=> 'plum' [1]=> 'grape' [3]=> 'potato'
          )

one thing;- the desired output you shown will not possible because same indexes are over-written with latest values inside array. So i think you need to reformat your desired output a bit — Death-is-the-real-truth
– Death-is-the-real-truth, Commented Dec 19, 2017 at 16:00

Death-is-the-real-truth · Accepted Answer · 2017-12-19 16:10:07Z

5

Problem:- You are over-writing your variable $myarray inside for() loop.

Solution:- You have to do it like below:-

$myarray = []; // you misses $
for($i = 0; $i < count($exampleArray); $i++){ // you forget $ again
  $myarray[] = $exampleArray[$i]['wanted_field']; //assign values to array
}

Or simply you can use array_column():-

$myarray= array_column($exampleArray, 'wanted_field');

Output of both example:- https://eval.in/922152

edited Dec 19, 2017 at 16:10

answered Dec 19, 2017 at 15:57

Death-is-the-real-truth

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Comments

Nigel Ren · Accepted Answer · 2017-12-19 16:01:01Z

3

If you just want to extract the values of one column from an array...

$myArray = array_column($exampleArray, 'wanted_field');

In your case, you were just overwriting the value to the last value in the array.

answered Dec 19, 2017 at 16:01

Nigel Ren

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2 Comments

AbraCadaver Over a year ago

I scrolled down to post this as an answer and there it already was.

Nigel Ren Over a year ago

I also see it's been added to other answers as well.

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