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POPHP include files are making JSON data invalid
 

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    <p>I'm relatively new to php development but not to web development in general.</p> <p>I have the following php file:</p> <pre><code>&lt;?php class dialogResult{ var $Message; var $Title; var $Height; var $GenericData; function __construct(){ $this-&gt;Height = 10; } } header("Cache-Control: no-cache", true); header("Content-type: application/json; charset=utf-8", true); $dr = new dialogResult(); $dr-&gt;Message = "A Test Message encoded"; $dr-&gt;Height = 10; $dr-&gt;GenericData = "Empty"; $dr-&gt;Title = "My Message"; echo(json_encode($dr)); ?&gt; </code></pre> <p>This returns JSON data as expected, however if I move the class to a separate file and add an include, include_once, require, or require_once it returns invalid JSON data. Can anyone tell me why this would be?</p> <p>It doesn't have to be just moving this class, if I have ANY included file it makes the data invalid.</p> <p>Thanks,</p> <p>Keith</p> <p>Here is the include class, I've also tried removing the ?></p> <pre><code>&lt;?php class dialogResult{ var $Message; var $Title; var $Height; var $GenericData; function __construct(){ $this-&gt;Height = 10; } } </code></pre> <p>There are no leading or trailing spaces anywhere. Here is the 'invalid' JSON that is returned:</p> <pre><code>{"Message":"A Test Message encoded","Title":"My Message","Height":10,"GenericData":"Empty"} </code></pre> <p>which gives me an "Unexpected Token" if I try to use JSONLint to Parse it. Of course, if I type it in by hand to JSONLint then it is fine. I imagine there is some character I can't identify/see showing up in the JSON but am not sure how to find it.</p>
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    1. COare you echoing/printing anything on the screen with these included files?
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