Describes how to use a php xml class.

Today, a program that re-writes an interface in the PHP4 environment needs to parse XML in a large amount. The xml_parse_into_struct () function of PHP cannot directly generate an easy-to-use array.

Preface

Today, a program that re-writes an interface in the PHP4 environment needs to parse XML in a large amount. The xml_parse_into_struct () function of PHP cannot directly generate an easy-to-use array. XML operation class. ========================================================== =====================================1, interpret the XML file as an easy-to-use array: <? PHP includes ('XML. php ') // reference the php xml operation class $ XML = obtain the webpage ("data. "); // read the xml file // $ XML = obtain the webpage (" php: // input supported ") // read the input stream from POST $ Data = XML_unserialize (XML); Echo'

'; Print_r (metadata); Echo"
 ';?> ######################################## ######################### Data. xml File: <? XML version = "1.0" encoding = "GBK"?>
 
  
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       ######################################## ########################## Use the XML operation class to generate the corresponding array (Chinese character encoding: UTF-8 ): arrange ([video] => arrays ([Upload] => arrays ([Video ID] => 998 [name] => Future Memories [memo] => DEF [up_userid] => 11317 ))) ========================================================== ======================================= 2, convert an array to an XML file: <? PHP includes ('XML. php'); // reference the xml operation class of php $ XML = XML_serialize (metadata);?> ========================================================== =====================================3, php xml Operation Source code <? PHP ####################################### ######################################## ###### XML Library, this code is open-source and is released under similar terms of Artistic License. # Read permission ##################################### ######################################## ######################################## ######################################## ########## XML_unserialize: use the original XML as a parameter (string) # return an equivalent PHP Data structure ############################### ######################################## ########### function XML_unserialize (XML) {$ xml_parser = new XML (); $ Data = & $ xml_parser> parsing ($ XML); $ xml_par Ser> self-destruction (); returned data ;} ######################################## ######################################## #### XML_serialize: any PHP Data structure is serialized to XML # with a parameter: data sequence. It must be an array. ######################################## ######################################## ### Function XML_serialize (metadata, meta level = 0, $ prior_key = NULL) {if ($ horizontal = 0) {ob_start (); Echo '<? XML version = "1.0"?> "," \ N ";} (list ($ key, value) = (data) (starting position of the string, strpos ($ key 'attr )) # If it is not an attribute # We do not treat our own attributes, so for the emptyempty element # has attributes, you still need to set the element to NULL (IS_ARRAY (value) and array_key_exists (0, $ value) {XML_serialize (key value $ level, dollar) ;}{ tag $ = $ prior_key? $ Prior_key: Dollar key; Echo str_repeat ("\ t", $ level), "<", $ tag; if (array_key_exists ("$ ATTR key", metadata )) {# If attributes of this element exist and (list ($ attr_name, attribute value) = ($ Data ["$ key ATTR"]) Echo ', $ attr_name, "=" ', using htmlspecialchars ($ attribute value),' "; reset ($ Data [" $ ATTR key "]);} (IS_NULL (value )) echo "/> \ N"; elseif (! IS_ARRAY (value) Echo '>', using htmlspecialchars (value),"\ N "; other Echo"> \ ", XML_serialize (value $ level + 1), str_repeat (" \ t ", $ level),"\ N ";} Reset (metadata); (dollar level = 0) {$ Strait = ob_get_contents (); ob_end_clean (); $ Strait returned ;}} ######################################## ######################################## #### XML class: practical tools to use PHP's XML processing functions ############################### ######################################## ########### XML class {variable $ parser XML parser reference variable $ file; # The entire XML structure is established, so the variable $ # The current parent of the parent pointer-the parent will be an array variable $ stack # The most recent parent of the stack at each nested level var directory $ last_opened_tag; # The Last tag opened by the trail. Function XML () {-> parser = corresponds to xml_parser_create (); xml_parser_set_option (& $> parser, XML_OPTION_CASE_FOLDING, false); xml_set_object (& $> parser, $); xml_set_element_handler (& $-> parser, 'open', 'near'); xml_set_character_data_handler (& $-> parser, 'data ');} self-destruction function () {xml_parser_free (& $-> parser);} function parsing (data) {-> File = array ();-> stack = array (); -> parent = & $-> data; returns xml_parse once (& $-> parser, & $ data, real )? $-> File: NULL;} feature enabled (& $ parser, $ tag $ attribute) {-> data = ''; # store temporary CDATA-> last_opened_tag = $ tag; (IS_ARRAY (parent) and array_key_exists ($ tag-> parent) {# If you see this tag (IS_ARRAY ($> parent [tag]) and array_key_exists (0, $-> parent [tag]) {# if the key is a number # This is the third or later $ tag instance, we have encountered the second instance marked with the dollar key = count_numeric_items ($-> parent [tag]) ;}{# $, which we have seen. If you want to migrate (array_key_exists ("$ tag attribute", $-> parent company )) {arrival = array ('0 attribute' =>&$-> parent ["$ tag ATTR"], & $-> parent [tag]); not set ($-> parent ["$ tag ATTR"]) ;}{ arrival = array (& $-> parent [tag]);} $> parent [tag] = & $ arrival; key of USD = 1 ;}$> Parent Company =&$-> parent [tag] ;}{$ = $ tag ;} (attribute)-> parent "key feature"] = $ attribute;-> parent = & $-> parent [key]; [] =$> stacked & $-> parent;} function data (& $ analyzer, data) {($> last_opened_tag! = NULL) # you do not need to store the blank space between tags-> data = $ Data;} function is disabled (& $ parser, $ tag) {if ($ last_opened_tag ==$ tag) {$> Parent Company =$-> data;-> last_opened_tag = NULL;} array_pop ($ stack); (this stack) $> Parent Company =&> stackable count ($> stackable)-1] ;}} function count_numeric_items (& $ Array) {returns IS_ARRAY (array )? Count (array_filter (get array_keys ($ Array), is_numeric): 0 ;}?>