ludo1960 Posted March 1, 2019 Share Posted March 1, 2019 Hi guys, I'm using PHP Simple DOM, thanks to the good folk her I'm making progress. The html i'm parsing has a bunch of links in a li ul structure. I've managed to get the top layer of links extracted and I would like to have a count of the number of child nodes in the layer below the main links. Here is my code: $html = file_get_html('test/php/book.html'); if(!empty($html)){ $lis = $html->find('.chunklist', 0)->children() ; for ( $i = 0 ; $i < count($lis) ; $i++ ) { $parent_term = $lis[$i]->first_child()->innertext . ', ' ; $parent_node = $lis[$i]->children[0]->attr['href'] . '<br>' ; //echo count($parent_node->children()) ; this gives error Warning: count(): Parameter must be an array or an object that implements Countable echo $parent_term . $parent_node ; $parent_node = $const . $parent_node ; echo $parent_node ; $html2 = file_get_html($parent_node) ; $lis2 = $html2->find('.chunklist', 0)->children() ; } } I don't see anything in the manual regarding counting nodes, any idea how to go about this? Link to comment Share on other sites More sharing options...
cyberRobot Posted March 1, 2019 Share Posted March 1, 2019 Are you looking to count what you get from the following line? $lis2 = $html2->find('.chunklist', 0)->children() ; If so, have you tried PHP's count() function? count($lis2) Note that I haven't used PHP Simple DOM. So I'm just guessing here. ? Link to comment Share on other sites More sharing options...
ludo1960 Posted March 2, 2019 Author Share Posted March 2, 2019 Good guess! Yeah I tried that, but some of the $lis2 don't have children, and I'm not sure how to deal with null results, $lis2 = $html2->find('.chunklist', 0)->children() ; results in: Fatal error: Uncaught Error: Call to a member function children() on null I've tried: for ( $j = 0 ; $j < count($lis2) ; $j++ ) { if ($lis2 > 0) { // and tried $lis2 <> 0 $parent_term = $lis2[$j]->first_child()->innertext . ', ' ; $parent_node = $lis2[$j]->children[0]->attr['href'] . '<br>' ; // echo count( $parent_node ) ; } else { echo "no data found" ; } } kinda stuck as to what to try next? Link to comment Share on other sites More sharing options...
maxxd Posted March 3, 2019 Share Posted March 3, 2019 According to the documentation, find() returns null if the requested object isn't found. So check for null before you attempt the children() call - right now you're checking if $lis2 is greater than 0. Link to comment Share on other sites More sharing options...
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