From: luizlaydner <luizlaydner>
Date: Mon, 13 Aug 2007 04:17:10 +0000 (+0000)
Subject: - a lib for php4 that is good substitute for simplexml
X-Git-Url: http://git.mjollnir.org/gw?a=commitdiff_plain;h=d71ea8ce19a91abb010c8965754a3dc7950ed662;p=moodle.git

- a lib for php4 that is good substitute for simplexml
---

diff --git a/lib/phpxml/xml.php b/lib/phpxml/xml.php
new file mode 100644
index 0000000000..77262855ed
--- /dev/null
+++ b/lib/phpxml/xml.php
@@ -0,0 +1,117 @@
+<?php
+###################################################################################
+#
+# XML Library, by Keith Devens, version 1.2b
+# http://keithdevens.com/software/phpxml
+#
+# This code is Open Source, released under terms similar to the Artistic License.
+# Read the license at http://keithdevens.com/software/license
+#
+###################################################################################
+
+###################################################################################
+# XML_unserialize: takes raw XML as a parameter (a string)
+# and returns an equivalent PHP data structure
+###################################################################################
+function & XML_unserialize(&$xml){
+	$xml_parser = &new XML();
+	$data = &$xml_parser->parse($xml);
+	$xml_parser->destruct();
+	return $data;
+}
+###################################################################################
+# XML_serialize: serializes any PHP data structure into XML
+# Takes one parameter: the data to serialize. Must be an array.
+###################################################################################
+function & XML_serialize(&$data, $level = 0, $prior_key = NULL){
+	if($level == 0){ ob_start(); echo '<?xml version="1.0" ?>',"\n"; }
+	while(list($key, $value) = each($data))
+		if(!strpos($key, ' attr')) #if it's not an attribute
+			#we don't treat attributes by themselves, so for an empty element
+			# that has attributes you still need to set the element to NULL
+
+			if(is_array($value) and array_key_exists(0, $value)){
+				XML_serialize($value, $level, $key);
+			}else{
+				$tag = $prior_key ? $prior_key : $key;
+				echo str_repeat("\t", $level),'<',$tag;
+				if(array_key_exists("$key attr", $data)){ #if there's an attribute for this element
+					while(list($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),"</$tag>\n";
+				else echo ">\n",XML_serialize($value, $level+1),str_repeat("\t", $level),"</$tag>\n";
+			}
+	reset($data);
+	if($level == 0){ $str = &ob_get_contents(); ob_end_clean(); return $str; }
+}
+###################################################################################
+# XML class: utility class to be used with PHP's XML handling functions
+###################################################################################
+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(){
+ 		$this->parser = &xml_parser_create();
+		xml_parser_set_option(&$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;
+}
+?>
\ No newline at end of file