Comma-separated string to associative array with lowercase keys - php

Question

I have a string like this:
$string = 'Apple, Orange, Lemone';
I want to make this string to:
$array = array('apple'=>'Apple', 'orang'=>'Orange', 'lemone'=>'Lemone');
How to achieve this?
I used the explode function like this:
$string = explode(',', $string );
But that only gives me this:
Array ( [0] => Apple [1] => Orange [2] => Lemone )
Somebody says this question is a duplicate of this SO question: Split a comma-delimited string into an array?
But that question is not addressing my problem. I have already reached the answer of that question, please read my question. I need to change that result array's key value and case. see:
Array
(
[0] => 9
[1] => admin#example.com
[2] => 8
)
to like this
Array
(
[9] => 9
[admin#example.com] => admin#example.com
[8] => 8
)

Answer 1

You may try :
$string = 'Apple, Orange, Lemone';
$string = str_replace(' ', '', $string);
$explode = explode(',',$string);
$res = array_combine($explode,$explode);
echo '<pre>';
print_r($res);
echo '</pre>';
Or if you need to make lower case key for resulting array use following :
echo '<pre>';
print_r(array_change_key_case($res,CASE_LOWER));
echo '</pre>';

Answer 2

<?php
$string = 'Apple, Orange, Lemone'; // your string having space after each value
$string =str_replace(' ', '', $string); // removing blank spaces
$array = explode(',', $string );
$final_array = array_combine($array, $array);
$final_array = array_change_key_case($final_array, CASE_LOWER); // Converting all the keys to lower case based on your requiment
echo '<pre>';
print_r($final_array);
?>

Answer 3

You can use array functions such as array_combine, and array_values
$string = 'Apple, Orange, Lemone';
$arr = explode(', ', $string);
$assocArr = array_change_key_case(
array_combine(array_values($arr), $arr)
);

Answer 4

<?php
$string = 'Apple, Orange, Lemone';
$array = explode(', ', $string);
print_r($array);
output will be
Array
(
[0] => Apple
[1] => Orange
[2] => Lemone
)
Now
$ar = array();
foreach ($array as $value) {
$ar[$value] = $value;
}
print_r($ar);
Your Desire Output:
Array
(
[Apple] => Apple
[Orange] => Orange
[Lemone] => Lemone
)

Answer 5

$valuesInArrayWithSpace = explode("," $string);
$finalArray = [];
foreach ($ValuesInArrayWitchSpace as $singleItem) {
$finalArray[trim(strtolower($singleItem))] = trim($singleItem);
}

Answer 6

This way you'll have what you need:
$lowerString = strtolower($string);
$values = explode(', ', $string);
$keys = explode(', ', $lowerString);
$array = array_combine($keys, $values);
print_r($array);

Answer 7

Or...
$csvdata = str_getcsv('Apple,Orange,Lemone');
$arr = [];
foreach($csvdata as $a) {
$arr[strtolower(trim($a))] = $a;
}
print_r($arr);

Answer 8

use array_flip to change the values as key and use array_combine
<?php
$string = 'Apple, Orange, Lemone';
$array = explode(', ', $string);
$new_array =array_flip($array);
$final_array = array_combine($new_array,$array)
print_r($final_array );
?>

Answer 9

A clean, functional-style approach can use array_reduce() after splitting on commas followed by spaces.
Before pushing the new associative values into the result array, change the key to lowercase.
Code: (Demo)
$string = 'Apple, Orange, Lemone';
var_export(
array_reduce(
explode(', ', $string),
fn($result, $v) =>
$result + [strtolower($v) => $v],
[]
)
);
Output:
array (
'apple' => 'Apple',
'orange' => 'Orange',
'lemone' => 'Lemone',
)