XML分析类php版
Posted on | 3月 24, 2012 | No Comments
<?php class XML{ 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 will be an array var $stack; #a stack of the most recent parent at each nesting level var $last_opened_tag; #keeps track of the last tag opened. function XML(){ $this->parser = xml_parser_create('utf-8'); xml_parser_set_option($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($this->parser, 'data'); } function destruct(){ xml_parser_free($this->parser); } function parse(&$data){ $this->document = array(); $this->stack = array(); $this->parent = &$this->document; return xml_parse($this->parser, $data, true) ? $this->document : NULL; } function open(&$parser, $tag, $attributes){ $this->data = ''; #stores temporary cdata $this->last_opened_tag = $tag; if(is_array($this->parent) and array_key_exists($tag,$this->parent)){ #if you've seen this tag before if(is_array($this->parent[$tag]) and array_key_exists(0,$this->parent[$tag])){ #if the keys are numeric #this is the third or later instance of $tag we've come across $key = count_numeric_items($this->parent[$tag]); }else{ #this is the second instance of $tag that we've seen. shift around if(array_key_exists("$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; } function data(&$parser, $data){ if($this->last_opened_tag != NULL) #you don't need to store whitespace in between tags $this->data .= $data; } function close(&$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($this->stack)-1]; } } function count_numeric_items(&$array){ return is_array($array) ? count(array_filter(array_keys($array), 'is_numeric')) : 0; } function xml_unserialize($xml){ $xml_parser = new XML(); $data = $xml_parser->parse($xml); $xml_parser->destruct(); return $data; } ?>
Category: PHP
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