PHP Array to JQuery

Question

I have an array passed to a page via session:

Array(
[0] => Somewhere
Belfast
[1] => New York
)

The data is then gathered in a JS variable:

var json_university_addresses = '<?php echo (Session::get('university_address'))?>';

Before it is then split into a JS array:

var aUniversityAddresses = json_university_addresses.split(',');

The problem I am getting is the line break between 'somewhere' and 'belfast'. This is causing the page to fail.

Is there anything I can do with the data either side to make this easier? I want to display the line break to the user.

Thanks

why Session::get('university_address') instead of $_SESSION['university_address']? — dnagirl
– dnagirl, Commented Aug 28, 2012 at 12:06
@dnagirl: He probably has a wrapper class to access session vars. But that's not really affecting the question asked — Bogdan
– Bogdan, Commented Aug 28, 2012 at 12:13

Daniel A. White · Accepted Answer · 2012-08-28 12:03:49Z

5

Wouldn't it be better (read: easier) to use json_encode? Then you can format it on the client side.

answered Aug 28, 2012 at 12:03

Daniel A. White

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3 Comments

rmccallum Over a year ago

I have tried json encode/decode but since the array is not key/value it just returns a standard array.

rmccallum Over a year ago

The same issue occurs with the line break in the first iteration. The result is a JS error: unterminated string literal

David Barker Over a year ago

Just a note as you are using Laravel. Send to your page using Response::json(Session::get('university_address') While laravel doesn't add much data to the string it does give it a common structure meaning you can write catch all JS functions without hand coding the JSON structure.

Hiren Soni · Accepted Answer · 2012-08-28 12:05:18Z

0

Here is the solution...

<?php
    $arr = array('a' => 1, 'b' => 2, 'c' => 3, 'd' => 4, 'e' => 5);
    echo json_encode($arr);
 ?>

answered Aug 28, 2012 at 12:05

Hiren Soni

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Comments

Bogdan · Accepted Answer · 2012-08-28 12:07:03Z

0

You could try implode directly in the php code to output an array directly:

var aUniversityAddresses = [<?php echo implode(",", Session::get('university_address'))?>];

http://php.net/manual/en/function.implode.php

answered Aug 28, 2012 at 12:07

Bogdan

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2 Comments

rmccallum Over a year ago

Sorry, the code should have hade implode around the session. This made no difference.

rmccallum Over a year ago

Or rather it did but gave a different error. As the line break was there the JS var thought the string was not terminated.

Community · Accepted Answer · 2017-05-23 10:24:40Z

0

You should first escape newline characters before outputting data to javascript:

$txt = str_replace( array( "\n", "\r" ), array( "\\n", "\\r" ), $txt);

This way, your final code would be:

$universities = Session::get('university_address');
$universities_string = implode(',', $universities);
$universities_js = str_replace( array( "\n", "\r" ), array( "\\n", "\\r" ), $universities_string);

And then in the javascript file:

var json_university_addresses = "<?php echo $universities_js ?>";

edited May 23, 2017 at 10:24

CommunityBot

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answered Aug 28, 2012 at 12:41

Corina

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Comments

rmccallum · Accepted Answer · 2012-08-28 12:42:29Z

0

Ok I managed to get what I wanted:

var json_university_addresses = '<?php echo (Session::has('university_address')) ? preg_replace('/[\r\n]+/', "\\n",addslashes(implode(',',Session::get('university_address')) )) : "" ?>';

Thanks for the help. I did a quick search on here for unterminated string literals with JSON and got the preg replace statement above.

Thanks

answered Aug 28, 2012 at 12:42

rmccallum

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Comments

Sumit Neema · Accepted Answer · 2012-08-28 13:12:09Z

0

I think the line breaks are there in your php array so you should remove them from your session array first then use it in script

$sesion_array=Session::get('university_address');

$sesion_array=array_filter($sesion_array,'myFunction');

function myFunction($elem)
{
  return str_replace("\n","&nbsp;",$elem); 
}

then try

var json_university_addresses = '<?php echo $sesion_array ?>';

answered Aug 28, 2012 at 13:12

Sumit Neema

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2 Comments

rmccallum Over a year ago

But that will affect the display for the user in the textbox will it not?

Sumit Neema Over a year ago

if you don't want line breaks just remove them if it is already in your session array.it will not affect the display it will be displayed correctly just try it once if it works

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