Error when passing PHP array to js

Question

I have this array ($test) in PHP

array (size=4)
  1 => string '[email protected]' (length=17)
  2 => string '[email protected]' (length=17)
  3 => string '[email protected]' (length=17)
  4 => string '[email protected]' (length=17)

And want to pass it to javascript. My goal is to use this in a AJAX query.

So I did the following

var test = "<?php echo json_encode($test); ?>";
$.post("../path/to/file.php",
{
  test: test,
},
function(data,status)
{ 
  ...
});

But the following is triggering everytime

SyntaxError: missing ; before statement
var test = "{"1":"[email protected]","2":"test1@mail.

Maybe a missing semicolon after var test = "<?php echo json_encode($test); ?>" ? Your code example is not complete, there is no var input as stated in you error message. — tino.codes
– tino.codes, Commented Nov 10, 2015 at 15:21

Marc B · Accepted Answer · 2015-11-10 15:23:01Z

3

Don't enclose the json output in quotes. It's unecessary:

var test = <?php echo json_encode($test); ?>;

json_encode() will already be adding any necessary " characters, and your extra " are breaking the syntax, e.g.

php:

$foo = 'ab"c';

json_encode($foo) -> "ab\"c";

js:

var test1 =  <?php echo json_encode($foo); ?>;
var test2 = "<?php echo json_encode($foo); ?>";

which comes out as:

var test1 = "ab\"c";      // this line is ok
var test2 = ""ab\"c"";  // this line is fubar
            ^--start string
             ^--end string
              ^^---undeclared/undefined variable

answered Nov 10, 2015 at 15:23

Marc B

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