Убедитесь, что перед первым тегом нет пробелов.Попробуйте это:
<?php
//Declarations
$file = "data.txt"; //The file to read from.
#Read the file
$fp = fopen($file, "r"); //Open the file
$data = ""; //Initialize variable to contain the file's content
while(!feof($fp)) //Loop through the file, read it till the end.
{
$data .= fgets($fp, 1024); //append next kb to data
}
fclose($fp); //Close file
#End read file
$split = preg_split('/(?<=<\/xml>)(?!$)/', $data); //Split each xml occurence into its own string
foreach ($split as $sxml) //Loop through each xml string
{
//echo $sxml;
$reader = new XMLReader(); //Initialize the reader
$reader->xml($sxml) or die("File not found"); //open the current xml string
while($reader->read()) //Read it
{
switch($reader->nodeType)
{
case constant('XMLREADER::ELEMENT'): //Read element
if ($reader->name == 'record')
{
$dataa = $reader->readInnerXml(); //get contents for <record> tag.
echo $dataa; //Print it to screen.
}
break;
}
}
$reader->close(); //close reader
}
?>
Установите переменную $ file в нужный файл.Обратите внимание, я не знаю, насколько хорошо это будет работать для файла 4 ГБ.Скажите, если это не так.
РЕДАКТИРОВАТЬ: Вот еще одно решение, он должен работать лучше с большим файлом (анализирует, как он читает файл).
<?php
set_time_limit(0);
//Declarations
$file = "data.txt"; //The file to read from.
#Read the file
$fp = fopen($file, "r") or die("Couldn't Open"); //Open the file
$FoundXmlTagStep = 0;
$FoundEndXMLTagStep = 0;
$curXML = "";
$firstXMLTagRead = false;
while(!feof($fp)) //Loop through the file, read it till the end.
{
$data = fgets($fp, 2);
if ($FoundXmlTagStep==0 && $data == "<")
$FoundXmlTagStep=1;
else if ($FoundXmlTagStep==1 && $data == "x")
$FoundXmlTagStep=2;
else if ($FoundXmlTagStep==2 && $data == "m")
$FoundXmlTagStep=3;
else if ($FoundXmlTagStep==3 && $data == "l")
{
$FoundXmlTagStep=4;
$firstXMLTagRead = true;
}
else if ($FoundXmlTagStep!=4)
$FoundXmlTagStep=0;
if ($FoundXmlTagStep==4)
{
if ($firstXMLTagRead)
{
$firstXMLTagRead = false;
$curXML = "<xm";
}
$curXML .= $data;
//Start trying to match end of xml
if ($FoundEndXMLTagStep==0 && $data == "<")
$FoundEndXMLTagStep=1;
elseif ($FoundEndXMLTagStep==1 && $data == "/")
$FoundEndXMLTagStep=2;
elseif ($FoundEndXMLTagStep==2 && $data == "x")
$FoundEndXMLTagStep=3;
elseif ($FoundEndXMLTagStep==3 && $data == "m")
$FoundEndXMLTagStep=4;
elseif ($FoundEndXMLTagStep==4 && $data == "l")
$FoundEndXMLTagStep=5;
elseif ($FoundEndXMLTagStep==5 && $data == ">")
{
$FoundEndXMLTagStep=0;
$FoundXmlTagStep=0;
#finished Reading XML
ParseXML ($curXML);
}
elseif ($FoundEndXMLTagStep!=5)
$FoundEndXMLTagStep=0;
}
}
fclose($fp); //Close file
function ParseXML ($xml)
{
//echo $sxml;
$reader = new XMLReader(); //Initialize the reader
$reader->xml($xml) or die("File not found"); //open the current xml string
while($reader->read()) //Read it
{
switch($reader->nodeType)
{
case constant('XMLREADER::ELEMENT'): //Read element
if ($reader->name == 'record')
{
$dataa = $reader->readInnerXml(); //get contents for <record> tag.
echo $dataa; //Print it to screen.
}
break;
}
}
$reader->close(); //close reader
}
?>