ajax - PHP: json_encode() SyntaxError if use of include_once() -

remark: using xampp on php i'm using json_encode() return data js/jquery ajax request.

the ajax call .js:

$.ajax({url: "/sys/search_rf/functions.php" ,     async: false, // wait reponse     type: "post",     data: { id: $('#id').val(),             status: $('#status').val(),             token: ctoken } ,     success: function(jsonresponse,status){ // post success         console.log(jsonresponse);     jsondata = json.parse(jsonresponse);             [...]         } 

it works fine until require_once() .php in functions.php.

require_once(dirname(dirname(__file__)).'/searches.php'); // -> ../searches.php 

output debug:

none of included php echoes/print @ all, except function returns json_encode().

so then, edited searches.php , left (debugging purpose):

<?php  ?> 

so i'm 100% sure nothing echoing, , kept:

require_once(dirname(dirname(__file__)).'/searches.php'); // -> ../searches.php 

in functions.php, responds ajax request.

but error stills:

syntaxerror: json.parse: unexpected character 

and if comment it, there no errors!

// require_once(dirname(dirname(__file__)).'/searches.php'); // -> ../searches.php 

i suppose every time require_once() 'echoes' something. don't know.

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i checkd eol/encoding of files. in unix format encoded in utf-8.

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this workaround do, think it's not proper solution:

jsondata = json.parse( jsonresponse.trim() ); 

.trim()

you should remove closing php tag , spaces before opening php tag. check if use utf-8 without bom in file.