如何获取foreach生成的html表的索引/数据

I load a xml file and loop on this to generate an html table. On each line of the table, I have two icones update and delete. When I click on the icone delete (for example), I want to get the index of the line or any information of the line in order to process delete the node in my xml file. I try with echo $number by passing parameter to php function but the GET is empty in the php file.I load a xml file and loop on this to generate