Several methods for PHP to read XML-php Tutorial

Several methods for PHP to read XML

Zhang Ying Male 28 Tank Male 28 1) DOMDocument reads xml $ Doc = new DOMDocument (); $ Doc-> load ('person. XML'); // read the xml file $ Humans = $ doc-> getElementsByTagName_r ("humans"); // get the object array of the humans tag Foreach ($ humans as $ human) { $ Names = $ human-> getElementsByTagName_r ("name"); // an array of objects that obtain the name tag $ Name = $ names-> item (0)-> nodeValue; // obtain the value in node, as shown in figure $ Sexs = $ human-> getElementsByTagName_r ("sex "); $ Sex = $ sexs-> item (0)-> nodeValue; $ Olds = $ human-> getElementsByTagName_r ("old "); $ Old = $ olds-> item (0)-> nodeValue; Echo "$ name-$ sex-$ old \ n "; } ?> 2) simplexml reading xml $ Xml_array = simplexml_load_file ('person. XML'); // read the data in xml to the array object. Foreach ($ xml_array as $ tmp ){ Echo $ tmp-> name. "-". $ tmp-> sex. "-". $ tmp-> old ." "; } ?> 3) use a php regular expression to record data $ Xml = ""; $ F = fopen ('person. XML', 'r '); While ($ data = fread ($ f, 4096 )){ $ Xml. = $ data; } Fclose ($ f ); // Read data above Preg_match_all ("/\ (.*?) \ <\/Humans \>/s ", $ xml, $ humans); // match the content in the outermost tag Foreach ($ humans [1] as $ k => $ human) { Preg_match_all ("/\ (.*?) \ <\/Name \>/", $ human, $ name); // match the name Preg_match_all ("/\ (.*?) \ <\/Sex \>/", $ human, $ sex); // match the gender Preg_match_all ("/\ (.*?) \ <\/Old \>/", $ human, $ old); // match the age } Foreach ($ name [1] as $ key => $ val ){ Echo $ val. "-". $ sex [$ key] [1]. "-". $ old [$ key] [1]." "; } ?> 4) xmlreader reads 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) {// judge the node type If ($ I % 3 ){ Echo $ reader-> value; // Get the node value } Else { Echo $ reader-> value ." "; } $ I ++; } } ?> 3. there are many methods to read xml. The above four methods can read the data in the tag and display it. however, their test focus is different. the design focus of the function reading xml in the first three methods is to read the values in the tag, which is equivalent to the text () method in jquery, xmlreader is not the same as xmlreader. Instead, xmlreader focuses on reading the values in tags and reading the attributes of tags to transmit data, all are placed in the attribute (but the method I wrote above still takes the value in the tag, because the xml file has been given, and I don't want to get the xml file out ). For example,Xmlreader is designed to read the name sex old value in data, and reading content is troublesome. It is equivalent to attr (") in jquery.