I have a simple PHP application, which uses MySQL DB, but I think that maybe the using of DB is needlessly for such easy operations.
Anyway, I hove some problems with the XML operations.
Let's say I want to have XML structure like this:
<root>
<experiment>
<name>test</name>
<accessCount>5</accessCount>
<downloadEntry>
<date>2015-11-27</date>
<comment>comment</comment>
</downloadEntry>
<downloadEntry>
<date>2015-11-28</date>
<comment>comment</comment>
</downloadEntry>
</experiment>
</root>
Now I would like to know, how to do these operations:
Count download entries (count of downloadEntry nodes) of experiment with name "test". Via XPATH?
Get download entries of experimetn with name test - but I would like to have pagination on this. So get download entries somehow like LIMIT 0,5.
The biggest problem is that, when there are no experiments - so the XML is , the loading of XML with simplexml_load_file fails. I can't open it. Yes, I can add the condition - if the XML is empty, donť open it. But I need to write to it and can't write if it isnť open.
Is there a solution for that?
Thanks everyone
Related
I am having trouble finding a solution to a problem I am facing, parsing XMLs.
Let me describe what I have now and what's the issue:
I have LINKs of XMLs files that have for example:
<prodcuts>
..
<product>
<id>1</id>
<name><![CDATA[ this is a test product name ]]></name>
<link><![CDATA[http://www.google.com]]></link>
<image><![CDATA[http://www.google.com/image.jpg]]></image>
<sku><![CDATA[ ]]></sku>
<category><![CDATA[ System > Technology ]]></category>
<price>20</price>
<description><![CDATA[ ]]></description>
<instock><![CDATA[ Y ]]></instock>
<availability>Y</availability>
</product>
..
</products>
Another XML has:
<prodcuts>
..
<product>
<productID>1</productID>
<title><![CDATA[ ]]></title>
<link><![CDATA[http://www.google.com]]></link>
<image><![CDATA[http://www.google.com/image.jpg]]></image>
<sku><![CDATA[ ]]></sku>
<categoryPath><![CDATA[ System > Technology ]]></categoryPath>
<price>20</price>
<description><![CDATA[ ]]></description>
<instock><![CDATA[ Y ]]></instock>
<availability>Y</availability>
<size>40</size>
</product>
..
</products>
Now, the difference between those are
1) the first one has a tag name "name", the other one has a tag name "title".
2) The second one has some tags that the first one does not.
Now the problem is, I am parsing the XML file via PHP like this:
$xml->products->product[$i]->id
$xml->products->product[$i]->name
and so on.. If I do this the code I have wrote, will work only for the first one. The tags that are missing is not a problem for now, cause I am inserting to Database NULL cause there are not required fields..
But, what about the second XML? Can I do something "automatically" in order to avoid asking to correct those tags?
This could be done only manually, by grabbing the content of this LINK (via PHP) and rename those ones?
I do not have the file from my clients, just the LINK of XML.
thanks in advance!
ok! I believe I have found some solutions to my problem.. I wrote them here in case someone has the same issues:
Solutions:
i) Read all the children of XML file, no matter how they are written (case-sensitive) and add them to Database. After that, there is a dashboard/PHP file with SQL queries that MATCH those children elements tags of XML with the one that you want.
In this case, you may want to create a file called whatever you like, for example test.xml and CREATE the one that you want, with the correct XML tag elements. In this case, you could UPDATE this, every some hour (according to your needs) via a cronjob..
ii) Create manually the PHP file with the parsing inside, for every XML that you get. Just make sure to keep the XML link in your DB
iii) Ask the client to give you the correct XML. XML is case-sensitive for a reason.
In case you choose the first solution you need to make changes to php.ini file too, cause the XML files may be too large and the max_execution_time is probably too low to run all these PHP - MySQL scripts.
if someone need more explain or have any better advice, please share!
I'm looking into the possibility of efficiently comparing two similar XML-files and updating outdated information.
The main XML-file I'm working with is about 200-250mb in size. The second is a tad smaller.
The two XML-files pretty much looks like this:
<product>
<Category>BOOK</Category>
<Bookgroup>BOOKF</Bookgroup>
<Productname>Name of the book</Productname>
<Productcode>123456789</Productcode>
<Price>79.00</Price>
<Availability>Stock On Order</Availability>
<ProductURL>www.url.com</ProductURL>
<Release>07.08.2013</Release>
<Author>Name of author</Author>
<Genre>Crime</Genre>
<BookType>Pocket</BookType>
<Language>English</Language>
</product>
As you can see I'm working with books, and the purpose of having a second XML-file with the same information is that I only want one copy of each book for further use.
Basically I'm trying to figure out how I effectively can parse through the first XML and check whether the book exists in the second XML. If it exists I'll check if productinformation (price, availabilty etc) have been updated. If this information has been updated this needs to be updated in the second XML as well.
If it doesnt exist it needs to be added to the second XML.
Using XMLReader I'm able to parse through each book from the first XML fairly fast (40ish seconds to loop through 4,5million lines of XML and echo out all the books) by using a similar approach as this.
My problem occurs when I want to check if this book exists in the second XML and make changes in the second XML if it needs to be updated or added.
Would it for example be possible to use XMLReader on the second XML and stop at nodes with the same booktitle as I've stopped at in the first XML and then make the check? If so how?
I am trying to build a very simple price comparison script.
Until now, I wrote a code that gets some product xml feeds from shops and with the help of XSLT I create a single-global xml of all those input XMLs. I use the XSLT because the shops have different names for elements.
Now I want to take it one step further and I want to create a search form that will display me the products let's say I have the term "laptop".
I know how to create a form, but I need a coding guidance to understand how to make it to search in my XML file (products.xml) and display let's say the
Thank you
You might want to check out http://php.net/manual/en/class.xmlreader.php
Using that it is pretty easy to navigate through an XML file and grab all the info you need.
EDIT:
On second thought, http://php.net/manual/en/book.simplexml.php is a MUCH simpler way to achieve what you're trying to do. Hence the name, I guess ;)
You can use SimpleXML library to parse your xml file. In my opinion SimpleXML is easier to use than xmlreader. Though SimpleXML is introduced on php5.
I have an XML feed coming in:
<?xml version="1.0" encoding="UTF-8"?><product>
<name>John</name>
<contact_email>john#johnson.com</contact_email>
<contact_telephone>01234 567</contact_telephone>
<url>www.johnsone.com.com</url></product>
I need to get this loaded to MySQL using php - have seen a few examples but all of them take a file saved locally.
My feed is taken from the internet so changes all of the time. Does anybody have any suggestions where to start?
Thanks
First you'll need to define a data model. Then you'll need an xml parser to parse the feed, extract the data and populate your data model. Then you'll need to pass your model object to a DAO which writes the data to your database.
If it's taken from the internet you can just do
<?php
$feedData = file_get_contents('http://mywebsite/myfeed.xml');
?>
if you want to parse the data and store then
create a table for product
parse the xml and get the fields
insert into db or update existing data
so, what's your problem?
To be a bit more specific:
You'll obviously need to set up a table and database structure. I'm going to assume you have, or at least can figure out how to, set this up, and how to write to a database. If not, there are plenty of tutorials on that that should be plenty helpful. You'll need to use PHP's built-in MySQL library.
For parsing the XML you will probably want to use SimpleXML. It's not clear how your feed is coming in, but SimpleXML has the simplexml_load_string function that will let you pass it a string containing an XML document, however you get it, for parsing.
From there, you can just take the parsed XML and write it to your database. Any examples that use SimpleXML with a local file should be pretty easy to adapt using simplexml_load_string instead of simplexml_load_file, and doing whatever you're already (presumably) doing to get the data from this feed.
I want to store the contents of an xml file in the database. Is there an easy way to do it?
Can i write some script that can do the task for me?
The schema of the XML file looks like this:
<schedule start="20100727120000 +0530" stop="20100727160000 +0530" ch_id="0210.CHNAME.in">
<title>Title_info</title>
<date>20100727</date>
<category>cat_02</category>
</schedule>
One thing to note is:
How do I read the start time? I need the time +0530 added to the time?
Thank you so much.
You'll probably want to create a table called schedules that matches your data, then read the contents of the XML file with an XML parser of your choice. SimpleXML might be the right tool for this job.
As for the dates, I recommend you try using the function date_parse_from_format().
look up simple_xml on the php page - off hand I'm not too hot on it, but basically you will end up with a loop which will add your data to an object eg:
$xml
and you will be able to call tags as such $xml->schedule->title $xml->schedule->date and $xml->schedule->category and you will be able to call attributes as such $xml->schedule[start] but you might wanna check that.
I had to do this recently for a client, and this was the best way I could find. The attributes may be tricky - I can't quite remember but you might have to look into namespaces and such... anyway, find simple_xml and you're on the right tracks.