What function can I use to split a string at a specific delimiter in PHP?

To split a string at a specific delimiter in PHP, you can use the `explode()` function. This function takes two parameters: the delimiter at which to split the string and the string itself. It returns an array of substrings that were separated by the delimiter.

$string = "apple,banana,orange";
$delimiter = ",";
$split_array = explode($delimiter, $string);

print_r($split_array);