How to read value of an array that has been sent from a php script

Question

Okay so I have a txt file.

I turn the data of the txt file into an array.

$lines = file($filename);

Then send the data back to the client ($filename is determined through ajax)

print_r( array_values( $lines ));

I retrieve the data from ajax

    success: function(docinfo){
        alert(docinfo);
    }

And I get something like this:

Array
(
    [0] => 10
    [1] => 123
    [2] => 455
    [3] => 325
    [4] => 33
    [5] => 3
)

but when I want to access the values of the array

console.log(docinfo[0]);//which represents the first line of my txt file

I get "A" which is the first letter of "Array". not the value of docinfo[0] which I want.

Is there a way where I can send the array and retrieve the values so I can use them the way I want?

print_r is for debug output. it's purely a string-based format, and it's NOT intended to be used for passing data around. you want json_encode(). — Marc B
– Marc B, Commented Jun 25, 2015 at 20:54

DontVoteMeDown · Accepted Answer · 2015-06-25 20:29:37Z

2

Did you tried printing the array with json_encode() ?

echo json_encode(array_values($lines));

answered Jun 25, 2015 at 20:29

DontVoteMeDown

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Comments

Daymon Schroeder · Accepted Answer · 2015-06-25 20:51:41Z

1

Javascript doesn't understand PHP's object format, you need to convert PHP's object into a form that a javascript parser can understand. We call that serializing, and javascript's format is called JSON.

<?php
echo json_encode(array_values($lines));
?>

this will give you something like:

  [
    1,2,3,4,5
  ]

Then you can change your onsuccess function to parse the JSON that PHP sent back:

success: function(docinfo){
    infoparsed = JSON.parse(docinfo)
    alert(docinfo[0]);
}

edited Jun 25, 2015 at 20:51

answered Jun 25, 2015 at 20:33

Daymon Schroeder

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