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Add function detect if any current context node, so that xpath() work… #37

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Add function detect if any current context node, so that xpath() work… #37

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18 changes: 18 additions & 0 deletions src/Rct567/DomQuery/DomQueryNodes.php
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Original file line number Diff line number Diff line change
Expand Up @@ -665,6 +665,24 @@ public function xpathQuery(string $expression, \DOMNode $context_node=null)
return false;
}

/**
* Shows if the context node can be used in xpath queries.
*
* If it's not set, it can be set then used in the following:
* @code
* if (!$dom->isContextNodeSet()) {
* $dom = $dom->find(':root');
* }
* $dom->xpath("/child::div[contains(concat(' ', normalize-space(@class), ' '), ' myclass ')]");
*
* @endcode
*
* @return bool
*/
public function isContextNodeSet() {
return (isset($this->root_instance) || isset($this->xpath_query));
}

/**
* Create dom xpath instance
*
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