PHP - Deleting content of div doesn't work in specific file -
i wrote function opens html file, deletes content of divs class , saves file. created 3 testfiles in 3 different locations. function works great on site.html , site3.html, not on site2.html
the folder structure following:
/testing/script.php // contains function
- /testing/site.html
- /testing/folder1/site2.html // script doesn't work in file
- folder2/site3.html
the html of files identical
<!doctype html public "-//w3c//dtd html 4.0 transitional//en" "http://www.w3.org/tr/rec-html40/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> </head> <body> <div class="string">content of site2.html</div> <div id="well">not here</div> <div id="empty"></div> <div>foo</div> </body> </html> this script.php
<?php $urls = array( "site.html", "/folder1/site2.html", "../folder2/site3.html" ); // urls of files function deletecontent () { global $urls; echo "deletecontent running"; if (is_array($urls) || is_object($urls)) { foreach($urls $url) { $dom = new domdocument; $dom->loadhtmlfile($url); $xpath = new domxpath($dom); $pdivs = $xpath->query(".//div[@class='string']"); foreach ( $pdivs $div ) { $div->removechild($div->firstchild); } $dom->savehtmlfile($url); } } } deletecontent(); ?> i error
catchable fatal error: argument 1 passed domnode::removechild() must instance of domnode, null given, called in /testing/script.php on line 57 , defined in /testing/script.php on line 29
// line 29 in original file (adjusted question)
foreach ( $pdivs $div ) { $div->removechild($div->firstchild); // line 29 }
all can suggest testing firstchild before removing it, because code otherwise seems fine.
foreach ( $pdivs $div ) { if( $div->firstchild ) { $div->removechild( $div->firstchild ); } }
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