Several ways to read XML with PHP

Zhang Ying
 Male
28


tank
Male
< ;old>28

1) DOMDocument reads xml

$doc = new DOMDocument();
$doc->load('person.xml'); //Read xml file
$humans = $doc->getElementsByTagName_r ( "humans" ); //Get the object array of the humans tag
foreach( $humans as $human )
{
$names = $human->getElementsByTagName_r( "name" ); //Get the object array of the tag name
$name = $names->item(0)->nodeValue; //Get the value in node, such as
$sexs = $human->getElementsByTagName_r( "sex" );
$sex = $sexs->item(0)->nodeValue;
$olds = $human->getElementsByTagName_r( "old" );
$old = $olds->item(0)- >nodeValue;
echo "$name - $sex - $oldn";
}
?>

2) simplexml reads xml

$xml_array=simplexml_load_file('person.xml'); //Read the data in XML into an array object
foreach($xml_array as $tmp){
echo $ tmp->name."-".$tmp->sex."-".$tmp->old."";
}
?>

3 ) Use php regular expressions to remember data

$xml = "";
$f = fopen('person.xml', 'r');
while( $data = fread( $f, 4096 ) ) {
 $xml .= $data;
}
fclose( $f );
// Read the data above
preg_match_all( "/(.*?)/s", $xml, $ humans ); //Match the content in the outermost tag
foreach( $humans[1] as $k=>$human )
{
preg_match_all( "/(.*?)
preg_match_all( "/(.*?)/", $human, $sex ); //Match the gender
preg_match_all( "/(.*?)/", $human, $old ); //Match age
}
foreach($name[1] as $key=> $val){
echo $val." - ".$sex[$key][1]." - ".$old[$key][1]."" ;
}
?>

4) xmlreader to read xml data

$reader = new XMLReader();
$reader->open('person.xml'); //Read xml data
$i=1;
while ($ reader->read()) { //Whether to read
if ($reader->nodeType == XMLReader::TEXT) { //Determine the node type
if($i%3){
echo $reader- >value; //Get the value of node
}else{
echo $reader->value."" ;
}
$i++;
}
}
?>

Three, summary There are many ways to read xml, just to name a few. The above four methods can all read the data in the tag, Zhang Ying. But their testing focus is different. The design focus of the function of reading xml in the first three methods is to read the value in the tag, which is equivalent to The text() method in jquery is different from xmlreader. Its focus is not on reading the value in the tag, but on reading the attributes of the tag and putting all the data to be transmitted in the attributes (but as I mentioned above The method I wrote still takes the value in the tag, because the xml file has been given, and I don’t want to create the xml file again).

Give me an example to explain, The design focus of xmlreader is to read the value of name sex old in data, but reading the content is more troublesome. It is equivalent to attr(”); in jquery.