phpxpath-users

beginning: importFromString()

[darcy w.c. <da...@10...>]

hi,

    i'm just beginning to work with PhpXPath.  i'm having trouble 
understanding how to work with a string rather than a file.  i've seen 
the method importFromString(), but i think my problem is that i don't 
understand how to apply the actual queries to it once it is loaded.  
Could someone give me an example or help me to understand how to work 
with both the XPathEngine and the XPath classes together.  Below is 
what i have tried:


  $xmlOptions = array(XML_OPTION_CASE_FOLDING => FALSE, 
XML_OPTION_SKIP_WHITE => TRUE);
  $xpath = new XPathEngine($xmlOptions);

  $xpath = $xpath->importFromString("<people><name 
id=\"2\">fred</name></people>");

// i know this is not right - so how to i use the XPath class methods, 
once i have
// used XPathEngine?
  $result = $xpath->getAttributes('//name[@id=2]','initial');

  print_r($result);


~darcy w. christ
1000camels

Re: beginning: importFromString()

[Peter R. <php...@pe...>]

On Sunday 07 Dec 2003 19:55, darcy w.christ wrote:
>   $xpath = new XPathEngine($xmlOptions);
>
>   $xpath = $xpath->importFromString("<people><name
> id=\"2\">fred</name></people>");

um, not tried this to see what it does, but Import returns true or 
false, so looks like you set $xpath to true :-)
try leaving out "$xpath ="

> // i know this is not right - so how to i use the XPath class
> methods, once i have
> // used XPathEngine?
>   $result = $xpath->getAttributes('//name[@id=2]','initial');

id is the attribute, 'fred' is the data content of the node. What is 
'initial'? I would have thought there were 3 cases: either you have 
the name and want the id, in which case you use getAttributes for the 
node with the name you are looking for, or you have the id and want 
the name, in which case you use getData for the id, or you have 
neither and want a list, in which case you use match/evaluate and 
loop through the result.

There's an example at the end of XPath.class.php