Problem to handle XML

Question

I am trying the following error when trying to manipulate an XML string

This is the XML I’m trying to read:

<?xml version="1.0" encoding="utf-8"?>
<integracao>
    <status>2</status>
    <resposta>
        <paginacao>
            <totalItens>2</totalItens>
            <paginaAtual>1</paginaAtual>              
            <registrosPorPagina>10</registrosPorPagina>        
            <ultimaPagina>1</ultimaPagina>
        </paginacao>
        <historico>
            <registro>
                <transacao>19569951</transacao>
                <email></email>
                <valor>2000</valor>        
                <dataEmissao>2014-09-02T12:09:14</dataEmissao>       
                <status>aguardando</status>
                <codigoStatus>1</codigoStatus>
            </registro>
            <registro>
                <transacao>19561474</transacao>
                <email></email>
                <valor>2000</valor> 
                <dataEmissao>2014-09-01T01:09:20</dataEmissao>  
                <status>aguardando</status>
                <codigoStatus>1</codigoStatus>
            </registro>
        </historico>
    </resposta>
</integracao>

This is the error that appears

Warning: simplexml_load_string(): Entity: line 1: parser error : XML declaration allowed only at the start of the Document in /var/www/gweb/admin/financial/chk.php on line 42

Warning: simplexml_load_string(): in /var/www/gweb/admin/financial/chk.php on line 42

Warning: simplexml_load_string(): in /var/www/gweb/admin/financial/chk.php on line 42

follow the path chk

$url = "https://go.gerencianet.com.br/api/historico/xml";
$token = "";

$xml = "<?xml version='1.0' encoding='utf-8'?>
        <integracao>
            <dataInicial>2013-01-01</dataInicial>
            <dataFinal>2014-12-31</dataFinal>
            <registrosPorPagina>10</registrosPorPagina>
            <pagina>1</pagina>
        </integracao>";

$xml = str_replace(array("\n", "\r", "\t"), '', $xml);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_MAXREDIRS, 2);
curl_setopt($ch, CURLOPT_AUTOREFERER, true);
$data = array("token" => $token, "dados" => $xml);

curl_setopt($ch, CURLOPT_POST, true);

curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
$response = curl_exec($ch);

curl_close($ch);

  echo $xml2 = "<xmp>".$response."</xmp>";

    echo '<br />';




#define o encoding do cabeçalho para utf-8
@header('Content-Type: text/html; charset=utf-8');
#carrega o arquivo XML e retornando um Objeto
$xml = simplexml_load_string("$xml2");

/*
foreach($xml->livro as $livro)
{
 echo $livro->cod;
#usando o utf8_decode para exibir com acentos
 echo $livro->titulo;
echo $livro->autor;
echo $livro->descricao;
echo $livro->preco;
echo "<br>";

}*/

Answer 1

This is a common mistake when you have comments or whitespace right at the beginning of your XML. Check if there is something like this in your document.

There are these two links that point out more robust solutions:

simplexml_load_file : XML declaration allowed only at the start of the Document!

Problem - XML declaration allowed only at the start of the Document!

Answer 2

found the solution of the problem look for the commented line

$url = "https://go.gerencianet.com.br/api/historico/xml"; $token = "";

$xml = "<?xml version='1.0' encoding='utf-8'?>
        <integracao>
            <dataInicial>2013-01-01</dataInicial>
            <dataFinal>2014-12-31</dataFinal>
            <registrosPorPagina>10</registrosPorPagina>
            <pagina>1</pagina>
        </integracao>";

$xml = str_replace(array("\n", "\r", "\t"), '', $xml);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_MAXREDIRS, 2);
curl_setopt($ch, CURLOPT_AUTOREFERER, true);
$data = array("token" => $token, "dados" => $xml);

curl_setopt($ch, CURLOPT_POST, true);

curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
$response = curl_exec($ch);

curl_close($ch);

//in this stop I just took the variable $Sponse and not $xml2

  echo $xml2 = "<xmp>".$response."</xmp>";

    echo '<br />';




#define o encoding do cabeçalho para utf-8
@header('Content-Type: text/html; charset=utf-8');
#carrega o arquivo XML e retornando um Objeto

///apenas troque a variavel nesta linha e tudo funciono perfeitamente

$xml = simplexml_load_string("$response");

/*
foreach($xml->livro as $livro)
{
 echo $livro->cod;
#usando o utf8_decode para exibir com acentos
 echo $livro->titulo;
echo $livro->autor;
echo $livro->descricao;
echo $livro->preco;
echo "<br>";

}*/