Example code for PHP methods to read XML files

This article summarizes the way PHP reads XML format files. Share to everyone for your reference, as follows:

Books.xml file:

<books><book><author>jack herrington</author><title>php Hacks</title>< Publisher>o ' Reilly</publisher></book><book><author>jack Herrington</author> <title>podcasting Hacks</title><publisher>o ' Reilly</publisher></book></books >

1. DOMDocument method

<?php$doc = new DOMDocument (); $doc->load (' books.xml '); $books = $doc->getelementsbytagname ("book"); foreach ( $books as $book) {    $authors = $book->getelementsbytagname ("author");    $author = $authors->item (0)->nodevalue;    $publishers = $book->getelementsbytagname ("publisher");    $publisher = $publishers->item (0)->nodevalue;    $titles = $book->getelementsbytagname ("title");    $title = $titles->item (0)->nodevalue;    echo "$title-$author-$publisher \ n";    echo "<br>";}? >

2. Read the XML with the SAX parser:

<?php$g_books = Array (); $g _elem = Null;function startelement ($parser, $name, $attrs) {    global $g _books, $g _elem;< C1/>if ($name = = ' book ') $g _books []= Array ();    $g _elem = $name;} function EndElement ($parser, $name) {    global $g _elem;    $g _elem = null;} function TextData ($parser, $text) {    global $g _books, $g _elem;    if ($g _elem = = ' AUTHOR ' | | $g _elem = = ' PUBLISHER ' | | $g _elem = = ' TITLE ') {        $g _books[count ($g _books)-1] [$g _elem] = $text;    }} $parser = Xml_parser_create (); Xml_set_element_handler ($parser, "startelement", "endElement"); xml_set_character_ Data_handler ($parser, "TextData"), $f = fopen (' books.xml ', ' R '), while ($data = Fread ($f, 4096)) {    Xml_parse ($par Ser, $data);} Xml_parser_free ($parser); foreach ($g _books as $book) {    echo $book [' TITLE ']. "-". $book [' AUTHOR ']. "-";    echo $book [' PUBLISHER ']. \ n ";}?" >

3. Parse the XML with a regular expression:

<?php$xml = ""; $f = fopen (' books.xml ', ' R '), while ($data = Fread ($f, 4096)) {  $xml. = $data;} Fclose ($f);p Reg_match_all ("/\<book\> (. *?) \<\/book\>/s ", $xml, $bookblocks); foreach ($bookblocks [1] as $block) {    Preg_match_all ("/\<author\> (. *?) \<\/author\>/", $block, $author);    Preg_match_all ("/\<title\> (. *?) \<\/title\>/",  $block, $title);    Preg_match_all ("/\<publisher\> (. *?) \<\/publisher\>/", $block, $publisher);    Echo ($title [1][0]. "-". $author [1][0]. "-" $publisher [1][0]. " \ n ");}? >

4. Parsing XML to an array

<?php  $data = "<root><line/><content language=\" gb2312\ "> Simple XML Data </content></ Root> ";  $parser = Xml_parser_create (); Create parser  xml_parse_into_struct ($parser, $data, $values, $index);//parse to array  xml_parser_free ($parser);//Release resources  //display array structure  echo "\ n indexed array \ n";  Print_r ($index);  echo "\ n data array \ n";  Print_r ($values);? >

5. Check that the XML is valid

<?php//Create XML parser $xml _parser = Xml_parser_create ();  Use case folding to ensure that these element names can be found in an array of elements xml_parser_set_option ($xml _parser, xml_option_case_folding, true);  Read XML file $xmlfile = "Bb.xml"; if (! (  $fp = fopen ($xmlfile, "R")) {die ("cannot read XML file $xmlfile");      }//Parse XML file $has _error = false; The flag bit while ($data = Fread ($fp, 4096)) {//loops through the XML document, only to EOF of the document, and stops parsing if (!xml_parse ($xml _parser, $data, feof ($FP)      ) {$has _error = true;    Break }} if ($has _error) {echo "The XML document is wrong!    <br/> ";    Output error rows, columns and their error messages $error _line = Xml_get_current_line_number ($xml _parser);    $error _row = Xml_get_current_column_number ($xml _parser);    $error _string = xml_error_string (Xml_get_error_code ($xml _parser));    $message = sprintf ("[%d rows,%d columns]:%s", $error _line, $error _row, $error _string);  Echo $message; } else {echo "The XML document is well-structured.  "; }//Close XML parser pointer, release resource Xml_parser_free ($xml _parser);? >

6. Can be used for accurate reading of XML

Test.xml

<?xml version= "1.0" encoding= "UTF-8"?>  <SBMP_MO_MESSAGE>    <connect_id>100</connect_ id>    <MO_MESSAGE_ID>123456</MO_MESSAGE_ID>    <receive_date>20040605</receive_date >    <RECEIVE_TIME>153020</RECEIVE_TIME>    <GATEWAY_ID>1</GATEWAY_ID>    < valid>1</valid>    <CITY_CODE>010</CITY_CODE>    <CITY_NAME> Beijing </CITY_NAME>    <STATE_CODE>010</STATE_CODE>    <STATE_NAME> Beijing </STATE_NAME>    <TP_PID> 0</tp_pid>    <TP_UDHI>0</TP_UDHI>    <MSISDN>15933626501</MSISDN>    < message_type>8</message_type>    <message>5618 Perennial supply seedlings, varieties have magnolia, yellow leaf Yang and so on. Contact Person: Zhang San, tel: 1234567890. </MESSAGE>    <LONG_CODE>100</LONG_CODE>    <service_code>9588</service_code >  </SBMP_MO_MESSAGE>

test.php:

<?php$mydata = Array (), $file = file_get_contents ("Test.xml"), if (Strpos ($file, ' <?xml ') >-1) {try {//load      Parse XML $xml = simplexml_load_string ($file);        if ($xml) {//echo $this->result;        Gets the node value $CONNECT _id = $xml->connect_id;        $MO _message_id = $xml->mo_message_id;        $RECEIVE _date = $xml->receive_date;        $RECEIVE _time = $xml->receive_time;        $GATEWAY _id = $xml->gateway_id;        $VALID = $xml->valid;        $CITY _code = $xml->city_code;        $CITY _name = $xml->city_name;        $STATE _code = $xml->city_code;        $STATE _name = $xml->state_name;        $TP _pid = $xml->tp_pid;        $TP _udhi = $xml->tp_udhi;        $MSISDN = $xml->msisdn;        $MESSAGE _type = $xml->message_type;        $MESSAGE = $xml->message;//sms $LONG _code = $xml->long_code;        $SERVICE _code = $xml->service_code;        Preg_match ("/(561) \d{1,2}/", $MESSAGE, $code); Switch ($codE[0]) {case 5618: $myData [message] = $MESSAGE;          Break Default: $myData [] = ' no short message.            ';          Break }} else {echo "Error loading XML file.        ";    }} catch (Exception $e) {Print_r ($e); }} else {echo ' does not have the XML file. ";} echo "<pre>";p Rint_r ($myData), echo "