PHP join() Function

The join() function returns a string from the elements of an array.

The join() function is an alias of the implode() function.

The join() function accept its parameters in either order. However, for consistency with explode(), you should use the documented order of arguments.The separator parameter of join() is optional. However, it is recommended to always use two parameters for backwards compatibility.

Example -

ParameterDescription
separatorOptional. Specifies what to put between the array elements. Default is "" (an empty string)
arrayRequired. The array to join to a string