javascript - Removing item from session array Jquery Ajax -

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I have a line for each element in a table. When the deleted image is clicked, I am trying to extract the element (image of the id is deleteRowButton ). At the moment, when you click on the image, nothing happens, however, if I remove the var index line, then the table row will be faded (but definitely not array elements) Is deleted. 

  $ (document) .on ('click', '#deleteRowButton', function () {var index = $ (this) .closest ('tr'). Attr (Id); // set index table row ID (numbers in the number corresponding to their position) remove_index (index); $ (this) .clostest ("tr") .FadeOut ('slow'); return back;}) ; Funct Ion remove_index (value) {$ .post (". / / Remove_array_item.php", {index: value})}}   
 To remove my code here  remove_array_item.php The array element:  
  & lt ;? php included (". / Config / init.php"); includes session_start () etc. $ index = $ _POST [ 'Index']; // index variable $ ca = $ _SESSION ["objColl"]; // Remove ARAR session variable $ ca-> delLineItem ($ index); // Remove array $ $ _SESSION ["objColl"] Enter on = $ Ca; Store Store as Store Variable? & Gt;   
 So what am I thinking:  
     
  1.  If I join in, the JQUF function closes:   
      Var index = $ (this) .closest ('tr'). Attr (id);   
     That is, if I comment it out, the function will fade the table row.  
       
    1.   remove_array_item.php  What's wrong with my function because even when I  var index  And just pass it   
        remove_index (1);   
       It still does not remove the item from the array and so when the index I refresh the page, the item is back in the table.   
       
       
       change  var index = $ (this) .closest ('tr'). Attr (id);  to  var index = $ (this) .clostest ('tr'). Attr ('id');  You forgot the quote around  id .

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