In the instructions for activity 7 of "Array Functions II" in the "Functions I" section, step three says:
- Then, print out join("," $the_array).
There should be a coma after the second quotation mark:
Then, print out join(",", $the_array).
This way the function is being passed the TWO arguments it needs: the separators that will separate the joined elements and the $array that will be joined. If that second comma is missing, PHP throws an error:
Parse error: syntax error, unexpected T_VARIABLE on line 8