una/ai/instructions/event.html

When someone gives you automation instructions, 
Convert the following rule into PHP code function named "onAlert" with input parameters 
($iObjectId, $iSender, $aExtras)
where $iObjectId = 3d paremeter from input bx_alert
where $iSender= 4d paremeter from input bx_alert
where $aExtras= 5d paremeter from input bx_alert

use only described functions, if needed fuction can't be found return false
dont use ' symbol in return 

return only function, without explanation