jquery - Can I update session via Ajax and after PHP read this session? -

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In my "estabelecimento.php" I send data to "carrinho.php" via Ajax and in one session Is stored. I want to use the session created on "carrinho.php" while refreshing the browser.

estabelecimento.php 

  & lt ;? Php session_start (); If (project ($ _ session ['prato'])) {echo 'session'; } Else {echo'session not found '; }? & Gt; & Lt; Script & gt; $ .ajax ({url: "carrinho.php", type: 'post', data: {idPrato: idPrato, quantidade: quantidade, detalhes: detalhes, acao: acao}}); & Lt; / Script & gt;   
 Carrinho.FP  
     
 
 
 add  session_start (); After opening   estabelecimento.php  in   tag.

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