I am trying to parse many HTML tables, with the URLs stored in the database. The current problem with my code is that it will fail on a different table every time. Here is the part of the code that gets the error:
while ($sqlrow = mysqli_fetch_row($res)) {
echo "Started Processing Table " . $tables . PHP_EOL;
$tables++;
$data = file_get_contents($sqlrow[1]);
$dom->loadHTML($data);
$dom->preserveWhiteSpace = false;
$teamtable = $dom->getElementById("reTeamTable");
$teamrows = $teamtable->getElementsByTagName('tr');
The lines that usually fails is either the "getElementById" command or the "getElementsByTagName" command. The error I am getting is: "PHP Fatal error: Call to a member function getElementsByTagName() on a non-object in /scouting/teamlist.php on line 20". I don't understand why this is getting an error on a different URL every time.
Its means that $dom doesnt find element with id="reTeamTable" ( $teamtable is null ). Before call getElementsByTagName , check $teamtable on empty.
Related
I'm trying to Query Data from my Database to put the result into the value form an input.
but when I want to fetch the Data, following error is showing up:
Fatal error: Uncaught MongoDB\Driver\Exception\InvalidArgumentException: Error parsing ObjectId string: 5f4286324becb3f60cbb866e
I really don't know how to solve it, i searched like 2 hours in the WWW.. I hope someone can help me..
Here's my Code:
$id = $_POST['id'];
echo $id;
$client = new MongoDB\Client;
$db = $client->thesis;
$personen = $db->Personen;
$document = $personen->findOne(['_id' => new MongoDB\BSON\ObjectId($id)]);
I'm getting the ID with the echo but the findOne Method isn't working.
Thanks for your answers :)
Cheeres
I've started writing a scraper for one site that will also have a crawler, since I need to go through some links, but I'm getting this error :
PHP Fatal error: Uncaught Error: Call to a member function find() on
null in D:\Projekti\hemrank\simple_html_dom.php:1129 Stack trace:
0 D:\Projekti\hemrank\scrapeit.php(37): simple_html_dom->find('ul')
1 D:\Projekti\hemrank\scrapeit.php(19): ScrapeIt->getAllAddresses()
2 D:\Projekti\hemrank\scrapeit.php(55): ScrapeIt->run()
3 {main} thrown in D:\Projekti\hemrank\simple_html_dom.php on line 1129
When I var_dump the $html variable I get the full html with all the tags, etc, that's why it's strange to me that it says "Call to a member function find() on null", when there's actually value in the $html. Here's the part of the code that's not working :
$html = new simple_html_dom();
$html->load_file($baseurl);
if(empty($html)){echo "HTTP Response not received!<br/>\n";exit;}
$links = array();
foreach ($html->find('ul') as $ul) {
if(!empty($ul) && (count($ul)>0))
foreach ($ul->find('li') as $li) {
if(!empty($li) && (count($li)>0))
foreach ($li->find('a') as $a) {
$links[] = $a->href;
}
else
die("NOT AVAILABLE");
}
}
return $links;
}
Is this a common problem with PHP simple HTML DOM parser, is there a solution or should I switch to some other kind of scraping?
I just searched for the lib you are using, this is line 1129:
return $this->root->find($selector, $idx, $lowercase);
So your error message is telling you that $this->root inside the class is null, therefore no find() method exists!
I'm no expert on the lib, as I use the awesome DOMDocument for parsing HTML, but hopefully this should help you understand what has happened.
Also, $html will never be empty in that code of yours, you already populated it when you instantiated it!
I suggest the following change:
$html->load_file($baseurl); to $html = file_get_html($baseurl);
On my VPS server it works with $html->load_file($baseurl); but on my dedicated local server it only works with $html = file_get_html($baseurl);
This solved my problem:
- Call to a member function find() on null
- simple_html_dom.php on line 1129
Using asimlqt/php-google-spreadsheet-client headers have to be set before updating or inserting rows. When users select a sheet I want to check if the headers are what I want them to be or if they are missing. I was trying to get the contents of cell(1,1) and if it was not equal to what I want then create all headers. The problem is, if cell(1,1) is empty I get a
"PHP Fatal error: Call to a member function getContent() on a non-object"
How do I check for empty without getting an error while making the call?
Here is my code:
$cellFeed = $worksheet->getCellFeed();
$cell1 = $cellFeed->getCell(1,1)->getContent();
if ($cell1 !== 'datein'){
$cellFeed->editCell(1,1, 'datein');
$cellFeed->editCell(1,2, 'timein');
$cellFeed->editCell(1,3, 'dateout');
$cellFeed->editCell(1,4, 'timeout');
$cellFeed->editCell(1,5, 'note');
}
The solution thanks to #eddyparkinson
$cell1 = $cellFeed->getCell(1,1)
if (!is_object($cell1) || $cell1->getContent() !== 'datein'){
Suggest you check if $cellFeed->getCell(1,1) returns an object.
CellFeed return values
The CellFeed only returns cells that have a value. It returns a sparse list of cells. There is no object to get the content of.
I use JasperServer and PHP JavaBridge to generate PDF reports via JasperServer inside PHP. I get compile error because of missing (unassigned) parameter passed to JRXML compiler
Fatal error: Uncaught [[o:Exception]:
"java.lang.Exception: Invoke failed:
[[c:JasperCompileManager]]->compileReport((o:String)[o:String]).
Cause: net.sf.jasperreports.engine.design.JRValidationException:
**Report design not valid** : 1. **Query parameter not found** : db_field_id VM:
1.6.0_18#http://java.sun.com/" at: #-12
net.sf.jasperreports.engine.design.JRAbstractCompiler.verifyDesign(JRAbstractCompiler.java:258)
I cant find a way to pass my
$params = new Java("java.util.HashMap");
foreach ($jrxml_params as $key => $jr_param) $params->put($key, $jr_param);
list of params to the compile method nor I can disable this verification by
$japser_props = new JavaClass("net.sf.jasperreports.engine.util.JRProperties");
$japser_props->COMPILER_XML_VALIDATION = false;
Here is what I use to generate PDF (works fine if JRXML file doesn't contain $P{} pamareters and halts otherwise)
$class = new JavaClass("java.lang.Class");
$class->forName("com.mysql.jdbc.Driver");
$driverManager = new JavaClass("java.sql.DriverManager");
$conn = $driverManager->getConnection("jdbc:mysql://localhost:3306/XXX?user=XXX&password=1234");
$compileManager = new JavaClass("net.sf.jasperreports.engine.JasperCompileManager");
$report = $compileManager->compileReport(realpath("/www/some.jrxml"));
$params = new Java("java.util.HashMap");
foreach ($jrxml_params as $key => $jr_param) $params->put($key, $jr_param);
$jasperPrint = $fillManager->fillReport($report, $params, $conn);
$exportManager = new JavaClass("net.sf.jasperreports.engine.JasperExportManager");
$outputPath = realpath(".")."/"."output.pdf";
$exportManager->exportReportToPdfFile($jasperPrint, $outputPath);
How do I avoid this error, I know what I need to pass and I don't know a way to do it, can't I just pass params to fillManager?
$japser_props = new JavaClass("net.sf.jasperreports.engine.util.JRProperties");
$japser_props->setProperty('net.sf.jasperreports.compiler.xml.validation',true);
this is the way to set property from PHP but that's not the problem. It turns out everything was fine, I've missed parameter declaration before my MySQL query... Put
<parameter name="db_field_id" class="java.lang.Integer">
in your JRXML before you use it as $P{db_field_id} now it compliles fine and later
$jasperPrint = $fillManager->fillReport($report, $params, $conn);
parameters are assigned at fill time
I am currently trying to display a RSS feed in a PHP page, but it seems to have a problem between the xslt_create() function and PHP5.
<?php
$xh = xslt_create();
$file=fopen(WEB_DIR . 'assets/_xml/rss.xml','r');
$xml=fread($file,16384);
fclose($file);
$file=fopen(WEB_DIR . 'assets/_xml/rss.xslt','r');
$xsl=fread($file,16384);
fclose($file);
$arguments = array(
'/_xml' => $xml,
'/_xsl' => $xsl
);
$result = xslt_process($xh, 'arg:/_xml', 'arg:/_xsl', NULL, $arguments);
xslt_free($xh);
print "$result";
?>
I get the error
Fatal error: Call to undefined
function xslt_create() in
What do I have to do to correct this issue ?
xslt_create only exists in PHP 4 - as this approach to parsing XML was removed in PHP 5.
As such, I'd recommend updating your code to use one of the current PHP 5 approaches as listed within the XML Manipulation section of the manual. (The XSL extension provides a XSLTProcessor class that is probably the nearest direct equivalent.)