read jquery array in php

Question

i am trying to retrieve the value of array via post in php script.

var data = [];
table.rows({ selected: true }).every(function(index){
 // Get and store row ID
 data.push(this.data()[0]); //create a 1 dimensional array
});
//send data via ajax 
$.ajax({ 
 url: '/...../...', 
 type: 'POST', 
 data: {userid:data}, 
 dataType: 'json', 

In my PHP script so far I am unable to decode the array. Have tried many ways

$myArray = $_REQUEST['userid'];
foreach ($arr as $value) {
 $userid= $value; //for now just trying to read single item 
}

I have tried print_r($myArray ); this sucessfully prints array contents to screen.

I am trying to retrieve the values for processing! Kindly point me in the right direction

• The One and Only ChemistryBlob: what do you want to do with the values?
• u_mulder: $myArray but foreach($arr )? Are you sure what you do here?
• T.Todua: Possible duplicate of Get data from php array - AJAX - jQuery
• mondersky: Could you show us the result of a var_dump. please
• user2810718: Here are the results of 'var_dump' : array(1) { ["userid"]=> string(21) "assssssss,camo,castor" } @mondersky

Answer 1

I don't think that PHP would recognise the array that you've called "data" as being an array. Couldn't you turn the data from your table rows into values in a JavaScript object, encode it as a JSON string, then post that to your PHP script and use json_decode($_POST["userid"]) on the PHP end to convert it into a PHP array.

• user2810718: Ive tried encoding the array before posting. This leads to circular reference error
• Ambulare: Did you add the values into an object, not an array, first?

Answer 2

The object you are posting to PHP isn't in particular a jQuery object. Instead it is an JSON object or rather a JSON string. I guess you can't read that object the way you would read an regular array in PHP.

You might want to try to decode the string with json_decode(). With true as an function argument, it will return an php array as suggested in this stackoverflow answer https://stackoverflow.com/a/6964549/6710876

$phpArray = json_decode($myArray, true);

Documentation of json_decode(): http://php.net/manual/en/function.json-decode.php

Answer 3

simply use:

echo json_encode($myArray);

• user2810718: Would this statement not simply post back the array to the calling script?

Answer 4

You're foreach is looping $arr, which doesn't exist. Your array is being set to $myArray, so use that in your for.

$myArray = $_REQUEST['userid'];
foreach ($myArray as $value) {
 $userid= $value; //for now just trying to read single item 
}

I believe you should also be able to find your values in $_POST

Answer 5

According to your var_dump :

array(1) { ["userid"]=> string(21) "assssssss,camo,castor" }

and if we assume "assssssss,camo,castor" are 3 different usernames. You should use this:

 $userids=explode(",",$myArray->userid);
 foreach($userids as $userid){
 // use $userid
 }