Function tln_findnxstr
This function looks for the next character within a string. It's really just a glorified "strpos", except it catches the failures nicely.
Parameters summary
| string | $body | The string to look for needle in. | 
| integer | $offset | Start looking from this position. | 
| string | $needle | The character/string to look for. | 
Return value summary
| 
			integer
		 | location of the next occurrence of the needle, or strlen($body) if needle wasn't found. | 
