pass two dimensional array from javascript to php but the size were reduced

Question

I want to pass a 2D array from javascript to PHP. but the result I get only part of the array.

I use arr.length to check the size is 75. and I use firefox developer tool to check the data posted is normal. but I use sizeof($arr) in PHP to check the size of 43.

I use apache as the server. the content of array is string but not more than 10 character.

the following is the code I used.

javascript:

    myCol= 0 + $('#tabResult th').length; //75 
    myRow= 0 + $('#tabResult tr').length; //62

    var data = new Array(myRow);
    for(i = 0; i < myRow; i++){
        data[i] = new Array(75);
    }

    $.post('getReport1/getReport1ExportXls',{
        table: $('#getReport1List').html(),
        data: data,
        myCol: myCol,
        myRow: myRow
    },function(o){
        openXls();
    });

`

PHP:

$data=$_POST['data'];

Update 1: In fact, the final array size(row x column) is closely to 1000. I already try to change php.ini max_input_vars = 30000 and run httpd -k restart but no effect.

the final array size is smaller. 13x75 and 1x72. but if i set the column like 32, the row I get may be greater like 43x32 and 1 x 16. So now I doubt the problem is due to the setting of php.ini . but I already tried. — Kenneth Chan
– Kenneth Chan, Commented May 6, 2016 at 3:50
I'm asking whether you're getting 3x2 array in PHP, if you pass 3x2 array from JavaScript. — Ruslan Osmanov
– Ruslan Osmanov, Commented May 6, 2016 at 3:52
if I only get 3x2 arry. it is normal. now I found the final array size i got will be close to 1000 if I want to get an array (size >1000) — Kenneth Chan
– Kenneth Chan, Commented May 6, 2016 at 3:54

Ruslan Osmanov · Accepted Answer · 2016-05-06 03:54:56Z

1

The data variable is an array of myRow items:

var data = new Array(myRow);

And each item is an array of 75 elements:

data[i] = new Array(75);

So you're generating an array of size myRow x 75:

data = [
  item_1: [ ... 75 items ... ]
  ...
  item_myRow: [ ... 75 items ... ]
]

In PHP you should get the same:

count($_POST['data']); // "myRow"
count($_POST['data'][0]); // 75

According to your question, myRow equals to 43.

Update

I recommend to pack the array in JSON:

data: JSON.stringify(data)

then decode it in PHP:

$data = json_decode($_POST['data'], true);

Then you'll be limited only to the post_max_size and to the memory_limit, of course.

edited May 6, 2016 at 3:54

answered May 6, 2016 at 3:26

Ruslan Osmanov

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1 Comment

Kenneth Chan Over a year ago

Sorry, my question before have misleading. the table should be 62 x 75. but finally I received is like (13 X 75 and 1 X 72 )

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