Implementation of XML Library in PHP

This article illustrates the XML operation class of the PHP implementation. Share to everyone for your reference, specific as follows:

This is an interface program, the need for a large number of analytical parsing xml,php xml_parse_into_struct () function can not directly generate an Easy-to-use array, and simplexml extension in PHP5 support, so browse search engine, Found a good PHP XML operation class on the Foreigner's website.

An example of usage:

1. Interpret the XML file as an Easy-to-use array:

<?php Include (' xml.php ');//reference PHP XML action class $xml =file_get_contents (' data.xml ');//Read XML file $xml = file_get_contents ("Php://input"); Read the input stream that came in post $data =xml_unserialize ($xml); Echo ' <pre> '; Print_r ($data); Echo ' </pre> '; ?>

Data.xml file:

<?xmlversion= "1.0" encoding= "GBK"?> <video> <upload> <videoid>998</videoid> <name><! [Cdata[Memories of the future]]></name> <memo><! [cdata[def]]></memo> <up_userid>11317</up_userid> </upload> </video>

The corresponding array generated by the XML action Class (encoding: UTF-8):

,

Array (  [video] => array    (    [upload] => Array      (      [vi Deoid] => 998      [name] => recalling the future      [memo] => def      [up_userid] => 11317     )   ) )

2. Convert an array to an XML file:

<?php Include (' xml.php ');//reference PHP XML action class $xml = Xml_serialize ($data); ?>

Second, the PHP XML operation class Source code:

<?php ################################################################################### # Xml_unserialize:takes Raw Xmlasa parameter (a string) #andreturns an equivalent PHP data structure ################################################################################### function& xml_unserialize (& $xml) { $xml _parser= &newxml (); $data = & $xml _parser->parse ($xml); $xml _parser->destruct (); Return$data; } ################################################################################### # xml_serialize:serializes Any PHP data structure into XML # takes one parameter:the data to serialize. Must be Anarray. ################################################################################### function& xml_serialize (& $data, $level = 0, $prior _key= NULL) { if ($level = = 0) {Ob_start (); Echo ' <?xml version= ' 1.0 '?> ', ' \ n ';} while (the list ($key, $value) = each ($data)) if (!strpos ($key, ' attr ')) #ifit ' s not a attribute #we don ' t treat attributes by themselves, Soforan emptyempty element # that has attributes your still need to set the element to NULL if (Is_array ($value) andarray_key_exists (0, $value)) { Xml_serialize ($value, $level, $key); }else{ $tag = $prior _key $prior _key: $key; Echostr_repeat ("T", $level), ' < ', $tag; if (array_key_exists ("$key attr", $data)) {#ifthere ' s an attributeforthis element while (the list ($attr _name, $attr _value) = each ($data ["$key attr"]) Echo ', $attr _name, ' = ', Htmlspecialchars ($attr _value), ' "'; Reset ($data ["$key attr"]); } if (Is_null ($value)) echo "/>\n"; ElseIf (!is_array ($value)) echo ' > ', Htmlspecialchars ($value), "</$tag >\n"; Elseecho ">\n", Xml_serialize ($value, $level + 1), str_repeat ("T", $level), "</$tag >\n"; } Reset ($data); if ($level = = 0) {$str = &ob_get_contents (); Ob_end_clean (); return$str;} } ################################################################################### # Xmlclass:utilityclassto be used with PHP ' s XML handling functions ################################################################################### classxml{ Var$parser; #a reference to the XML parser Var$document; #the entire XML structure built up so far Var$parent; #a pointer to the current parent-the parent would be Anarray Var$stack; #a stack of the most recent parent at each nesting level Var$last_opened_tag; #keeps track of the last tag opened. Functionxml () { $this->parser = &xml_parser_create (); Xml_parser_set_option (& $this->parser, xml_option_case_folding, false); Xml_set_object (& $this->parser, & $this); Xml_set_element_handler (& $this->parser, ' open ', ' close '); Xml_set_character_data_handler (& $this->parser, ' data '); } Functiondestruct () {xml_parser_free (& $this->parser);} function& Parse (& $data) { $this->document =array (); $this->stack =array (); $this->parent = & $this->document; Returnxml_parse (& $this->parser, & $data, True)? $this->document:null; } Functionopen (& $parser, $tag, $attributes) { $this->data = '; #stores Temporary CDATA $this->last_opened_tag = $tag; if (Is_array ($this->parent) andarray_key_exists ($tag, $this->parent)) {#ifyou ' ve seen this tag before if (Is_array ($this->parent[$tag]) andarray_key_exists (0, $this->parent[$tag]) {#ifthe keys are numeric #this is the Thirdorlater instance Of$tagwe ' ve come across $key = Count_numeric_items ($this->parent[$tag]); }else{ #this is the second instance of$tagthat we ' ve seen. Shift Around if (array_key_exists ("$tag attr", $this->parent)) { $arr =array (' 0 attr ' =>& $this->parent["$tag attr"], & $this->parent[$tag]); unset ($this->parent["$tag attr"]); }else{ $arr =array (& $this->parent[$tag]); } $this->parent[$tag] = & $arr; $key = 1; } $this->parent = & $this->parent[$tag]; }else{ $key = $tag; } if ($attributes) $this->parent["$key attr"] = $attributes; $this->parent = & $this->parent[$key]; $this->stack[] = & $this->parent; } Functiondata (& $parser, $data) { if ($this->last_opened_tag!= NULL) #you don ' t need to store whitespace in between tags $this->data. = $data; } Functionclose (& $parser, $tag) { if ($this->last_opened_tag = = $tag) { $this->parent = $this->data; $this->last_opened_tag = NULL; } Array_pop ($this->stack); if ($this->stack) $this->parent = & $this->stack[count ($this->stack)-1]; } } Functioncount_numeric_items (& $array) { Returnis_array ($array) Count (Array_filter (Array_keys ($array), ' Is_numeric '): 0; } ?>