What PHP function can be used to achieve the desired result in a single line of code?

To achieve the desired result in a single line of code, we can use the `implode()` function in PHP. This function allows us to join array elements with a string separator to create a single string. By passing the array of elements we want to join as the first argument and the separator as the second argument, we can quickly concatenate the elements into a single string. 

$elements = array('apple', 'banana', 'orange');
$result = implode(', ', $elements);
echo $result; // Output: apple, banana, orange

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PHP function single line of code achieve desired result

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