XML Parsing and function return values

[opengavel]

I am attempting to create a script that will search through a directory tree, find any xml files, and update an index (in a MySQL D😎 whenever the script finds a file that hasn't been previously indexed.

My problem is with the XML parse function (something I am not too familar with). Each xml file has a pair of ID tags that contain a unique number. I want the "idCheck" function to return a true/false on whether it finds the number already listed in the DB, but the extra functions involved in parsing have me confused as to how best to do this. How would I get the return value from the "contents" func back to the script that calls "idCheck."

Here is what I have so far.

If you happen to spot any other probs/issues, please speak up.

Thx.

function idCheck($file) {
  // function to check if a file's id is already in DB
  $xmlparser = xml_parser_create();
  xml_set_element_handler($xmlparser, "startTag", "endTag");
  xml_set_character_data_handler($xmlparser, "contents");
  $current = "";
  if (!($fp = fopen($file, "r"))) {
    die("failed to open $file");
  } else {
    while ($data = fread($fp, 4096)){
    $data=eregi_replace(">"."[[:space:]]+"."<","><",$data);
      if (!xml_parse($xmlparser, $data, feof($fp))) {
        $reason = xml_error_string(xml_get_error_code($xmlparser));
        $reason = xml_get_current_line_number($xmlparser);
        die($reason);
      } 
    }
    fclose($fp);
  }
  xml_parser_free($xmlparser);
}

function startTag($parser, $name, $attribs){
  global $current;
  $current = $name;
} 
function endTag($parser, $name){
  global $current;
} 
function contents($parser, $data){
  global $current;
  if ($current=="ID") {
    // Look for ID match in DB
    mysql_connect(localhost,"xxx","xxx");
    @mysql_select_db(masterindex) or die ("Unable to select database");
    $query="SELECT * FROM cases WHERE fullid='$data'";
    $result=mysql_query($query);
    $num=mysql_numrows($result);
    mysql_close();
    // if statement dependent on successful match
    if ($num==0) {
      echo "returning (false)";
      return ("false");
    } else {
      $casename=mysql_result($result,0,"casename");
      echo "returning (name)";
      return ($casename);
    } 
  }
} 

[opengavel]

Nobody...?

[BobLennon]

opengavel wrote:

Nobody...?

Perhaps some thought to XML parsing it's application to your problem, and what you want to be done (code not withstanding) might help in a reply.

[opengavel]

BobLennon wrote:

Perhaps some thought to XML parsing it's application to your problem, and what you want to be done (code not withstanding) might help in a reply.

I am sorry but I don't understand the above sentence.

I am trying to create a function to return a true/false value when parsing an XML document based on whether the contents of a tag matches an entry in a separate DB that indexes all the xml documents.

My problem is that all the example scripts I have seen for XML parsing use separate functions when (1) a start tag is encoutered, (2) an end tag is encoutered, and (3) when the contents of the tags is encountered.

I can put the code for identifying the proper tag and checking against the DB index in the contents function but how do I return the true/false value from the main parsing function.

Anyone please.......

[opengavel]

Ok, I will try to ask the question yet another way.

If you want to call a function and catch its return value you would normally do something like:

$result = func1 ($varible);

However, when you call the function that reacts to the contents of xml tags when parsing it is called like this:

xml_set_element_handler($xmlparser, "startTag", "endTag"); 
xml_set_character_data_handler($xmlparser, "contents"); 

So, how do I make startTag, endTag, or contents functions to catch a return value like the first example?

[opengavel]

I hunted around online and found out that the only way to get a return value from these type of event-based parser functions is to rely on global variables.

Issue Resolved.

[Revraz]

I'm trying Global Variables as well, but it still seems to not be passing my variables.