Errors in PHP script

@frncsknNov 09.2020

I’m currently working on a feature in my web app where I can upload a file. But everytime I upload something this errors appears:

`
array(1) { [“file”]=> array(5) { [“name”]=> string(39) “Screenshot from 2020-11-09 18-53-37.png” [“type”]=> string(9) “image/png” [“tmp_name”]=> string(14) “/tmp/phpAdl88R” [“error”]=> int(0) [“size”]=> int(452262) } } Your document was uploaded successfully
Notice: Trying to get property ‘childNodes’ of non-object in /var/www/html/fileUpload.php on line 26

Warning: Invalid argument supplied for foreach() in /var/www/html/fileUpload.php on line 28

Warning: DOMDocument::save(../super_user/overview.html): failed to open stream: No such file or directory in /var/www/html/fileUpload.php on line 46
`
Also the file is successfully uploaded but when I check in the folder it is automatically locked. I’m using Linux OS

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PHP

11 Comments(s) _↴

@NogDogNov 09.2020 — #Pretty hard to tell without seeing the relevant code. Sounds like an error from something using the [DOM extension](https://www.php.net/manual/en/book.dom.php), which seems at odds with processing a PNG image file? 🤷‍♂️

@frncsknauthorNov 10.2020 — #@NogDog#1624950 The first error I got was something to the effect of "the DOM is not installed" so I Installed it and now this error appeared. I also tried to upload a pdf file and the same error appeared.

@NachfolgerNov 10.2020 — #[Can't tell you anything without relevent code. ](https://stackoverflow.com/help/minimal-reproducible-example)

@frncsknauthorNov 10.2020 — #@NogDog#1624950 @Nachfolger#1624954 For clarification this is the code that I wrote:

``<i>
 </i>&lt;?php
 ini_set('display_errors', '1');
 error_reporting(E_ALL);
 var_dump($_FILES);
 $uploadok = true;
 // check if an error occured at uploading
 if (0 &lt; $_FILES['file']['error']) {
 echo 'Error: ' . $_FILES['file']['error'] . '&lt;br&gt;';
 $uploadok = false;
 } else {
 // upload was successful
 move_uploaded_file($_FILES['file']['tmp_name'], 'uploads/' . $_FILES['file']['name']);
 echo 'Your document was uploaded successfully';
 }
 $filename = 'uploads/' . $_FILES['file']['name'];
 if ($uploadok) {
 // create instance od DOMDocument
 $doc = new DOMDocument();
 // supress errors as DOMDocument does not know
 // about HTML5 elements
 libxml_use_internal_errors(true);
 // load HTML file
 $doc-&gt;loadHTMLFile("overview-tpl.html");
 // get child nodes of of the section
 // containing info about the PDF document
 $nodes = $doc-&gt;getElementById('doc1')-&gt;childNodes;
 // loop through all nodes
 foreach ($nodes as $node) {
 // check if node is an element node
 if ($node-&gt;nodeType == XML_ELEMENT_NODE) {
 // provide class of current node
 $class = $node-&gt;getAttribute('class');
 // is this the a element containing the link to the PDF?
 if (strstr($class, 'link-to-pdf')) {
 // set attribute href to the path of the PDF
 $node-&gt;setAttribute('href', $filename);
 }
 // is this the container for date and time?
 if (strstr($class, 'time-of-issue')) {
 // enter date and time
 $node-&gt;textContent = strftime('Issued at %I:%M %p %d %B %Y');
 }
 }
 }
 // save document
 $doc-&gt;save('../super_user/overview.html');
 }
 
 ?&gt;<i>
 </i>``

@NogDogNov 10.2020 — #Best guess is that whatever is in overview-tpl.html does not have an HTML element with an id value of "doc1" (e.g. something like <div id="doc1">); i.e.: $nodes = $doc->getElementById('doc1') is returning FALSE, and FALSE is not an object that might have a property named childNodes. ;)

@frncsknauthorNov 10.2020 — #@NogDog#1624956 Thanks for the reply. Will into it.

@frncsknauthorNov 10.2020 — #@NogDog#1624956 another thing that is weird. the file is uploaded successfully and its saved to a folder that I made. but when I view in the filemanager of ubuntu. its locked

@NachfolgerNov 10.2020 — #> @frncskn#1624958 another thing that is weird. the file is uploaded successfully and its saved to a folder that I made. but when I view in the filemanager of ubuntu. its locked

You probably aren't the owner of the directory. Add yourself alongside www-data or whatever it's currently set to.

@frncsknauthorNov 10.2020 — #@Nachfolger#1624970 I just did that and now this are the errors:

``<i>
 </i>array(1) { ["file"]=&gt; array(5) { ["name"]=&gt; string(60) "Background Check Authorization Form for Word revised (1).pdf" ["type"]=&gt; string(15) "application/pdf" ["tmp_name"]=&gt; string(14) "/tmp/phpYI8dH9" ["error"]=&gt; int(0) ["size"]=&gt; int(306125) } } Your document was uploaded successfully
 Notice: Trying to get property 'childNodes' of non-object in /var/www/html/fileUpload.php on line 26
 
 Warning: Invalid argument supplied for foreach() in /var/www/html/fileUpload.php on line 28
 
 Warning: DOMDocument::save(../super_user/overview.html): failed to open stream: No such file or directory in /var/www/html/fileUpload.php on line 46<i>
 </i>``

@NachfolgerNov 10.2020 — #@frncskn#1624972 They aren't errors, they're warnings. The distinction is significant.

Warning 1: Trying to get property 'childNodes' of non-object

- NogDog already gave you a debugging starting point for it.

Warning 2: Invalid argument supplied for foreach()

- Rooted in foreach ($nodes as $node) { ... }

- Fix warning 1 to fix this one

Warning 3: failed to open stream: No such file or directory

- Rooted in $doc->save('../super_user/overview.html')

- That's a plaintext error. Saving the document in that location isn't possible. Does the directory "super_user" exist?

@NogDogNov 10.2020 — #As far as saving the document, if working on a web host, your PHP script is likely being run via a separate user (nobody, apache, etc.) rather than your personal login accout. Therefore you may need to make sure that user has read/write access on that directory.

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