phparrayskey

Set keys of a flat indexed array using the array's values

I have an array like this:

$array = array(
    'mango',
    'apple',
    'orange',
    'peach'
);

I want to turn it into a new variable like this:

$options = (
    'mango' => 'mango',
    'apple' => 'apple',
    'orange' => 'orange',
    'peach' => 'peach'
);

basically I want to make the array value become the array key, I can achieve it with a loop like this:

foreach($array as $value){
    $options[$value] = $value; 
}

but is there any native PHP function or one-liner function that acts the same way as the above function?

Solution

  • You can use array_combine() https://www.php.net/manual/en/function.array-combine.php:

    $options = array_combine($array, $array);

    You should probably make sure array contains only unique values first using array_unique() to avoid key conflicts.