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POPHP's XML Output Error: "XML or text declaration not at the start of entity"
 

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  1. POPHP's XML Output Error: "XML or text declaration not at the start of entity"
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    <p>I'm using PHP version > 5.2 (5.2.17 on my web server and 5.3.6 on my localhost) with the following settings:</p> <pre><code>output_buffering = On output_handler = ob_gzhandler </code></pre> <p>In the following PHP script I'm outputting an XML response to use with jQuery/AJAX</p> <pre><code>if (empty($_GET)) { $Response = new Response('getlanguage'); $Response-&gt;DisplayLanguage(LanguagesManager::GetLanguage()); die(); } IOManager::InputSanitizeRequest($_GET); $Language = isset($_GET['language']) ? $_GET['language'] : ''; $Response = new Response('setlanguage'); if (LanguagesManager::ValidateLanguage($Language)) { LanguagesManager::SetLanguage($Language); $Response-&gt;DisplayResult(true); } else $Response-&gt;DisplayResult(false); </code></pre> <p>But my jQuery/AJAX function is not working and, if I try to manually check the output of my PHP script, I get the following error on Mozilla Firefox:</p> <pre><code>XML Parsing Error: XML or text declaration not at the start of entity Address: http://127.0.0.1/responses/requestlanguage.php?language=it Line Number 1, Column 2: &lt;?xml version="1.0" encoding="UTF-8" standalone="yes"?&gt; -^ </code></pre> <p>And that's caused by a trailing whitespace before the XML declaration:</p> <pre><code>" &lt;?xml version="1.0" encoding="UTF-8" standalone="yes"?&gt;" </code></pre> <p>I've checked out my PHP tags and everything is fine. After messing up a little bit with my code, I discoveded something incredible: the whitespace is created by this function:</p> <pre><code>LanguagesManager::ValidateLanguage($Language) public static function ValidateLanguage($Language) { return in_array($Language, self::GetSupportedLanguages()); } </code></pre> <p>If I comment the whole if statement, or if i replace that function with a simple "true" I don't get the parsing error anymore... well, I just can't belive it. Can someone explain me why? Anyone knows a solution?</p>
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    1. USTommaso Belluzzo
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    1. This table or related slice is empty.
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      1. POPHP's XML Output Error: "XML or text declaration not at the start of entity"
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      1. VTUpMod
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      1. POPHP's XML Output Error: "XML or text declaration not at the start of entity"
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
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      1. POPHP's XML Output Error: "XML or text declaration not at the start of entity"
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      1. VTUpMod
    1. COAre you certain it's not returning `false` and executing the `else` portion? Also, could `self::GetSupportedLanguages()` change anything for some reason? (I assume not, but it doesn't hurt to check.)
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      1. POPHP's XML Output Error: "XML or text declaration not at the start of entity"
      1. USWiseguy
 

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