how to make a 2 level array to asimple array [duplicate] - php

Question

This question already has answers here:
How to Flatten a Multidimensional Array?
(31 answers)
Closed 3 years ago.
I have an array like this:
[12601] => Array (
['docUpload'] => html dom.txt
)
[12602] => Array (
['docUpload'] => PYTHON AND DJANGO ARE HUGE IN FINTECH.txt
)
[12603] => Array (
['docUpload'] =>
)
How to get it like this:
12601 => html dom.txt
12602 => PYTHON AND DJANGO ARE HUGE IN FINTECH.txt
can you help me please?

Answer 1

Use array_column() to get the values, then combine them with array_combine() and array_keys().
$values = array_column($array, 'docUpload');
$newArray = array_combine(array_keys($array), $values);
Live demo at https://3v4l.org/lG4KO

Answer 2

You can loop over the array by foreach()
Steps:
1) Take a new blank array. We are appending our results into this.
2) If the array is not empty, loop over the array by foreach
3) Use key value pairs. Key is the id in required array.
4) Value is an array with key docUpload to be the document name.
5) Append new element with id and value (docUpload).
6) Resulting array will be a single dimensional array.
Final Code:
$arr = [];
$arr[12401] = ['docUpload' => ''];
$arr[12601] = ['docUpload' => 'html dom.txt'];
$arr[12602] = ['docUpload' => 'PYTHON AND DJANGO ARE HUGE IN FINTECH.txt'];
$arr[12603] = ['docUpload' => ''];
$newArr = [];
if (! empty($arr)) {
foreach ($arr as $id => $docArr) {
$newArr[$id] = $docArr['docUpload'];
}
}
echo '<pre>';print_r($newArr);echo '</pre>';
Output:
Array
(
[12401] =>
[12601] => html dom.txt
[12602] => PYTHON AND DJANGO ARE HUGE IN FINTECH.txt
[12603] =>
)
Working Link:

Answer 3

You need to do as follows:
foreach ($arrayData as &$value) {
$value = isset($value['docUpload']) ? $value['docUpload'] : '';
}
It will result in following array:
[docUpload] => [
[12601] => html dom.txt
[12602] => PYTHON AND DJANGO ARE HUGE IN FINTECH.txt
];