Created since USSD/SMS talk at the M:Lab
Sample PHP script that processes a tree from the format that Safaricom sends a USSD request
#Example Usage
/ussd.php?ussd_string=1*0*2
Should go: First item from the main tree, Back to the main tree, and Back to the second item from the main tree.
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####Dial *291# to test our USSD service on Safaricom Only 10KES per week (not per SMS)