LAMP How To - Open Source At Work

3rd party ads spacing issues in your website

bpeh — Wed, 08 Feb 2012 03:07:01 +0000

ads are good but can be annoying at times as they usually bring in some extra html or css that might mess with your layout. take google ads for example, it sometimes inject a fix height and width to an ad even if it doesnt pull in any ads. so the solution is to implement a [...]

using set_transient in wordpress

bpeh — Sat, 14 Jan 2012 11:54:05 +0000

set_transient is an excellent caching mechanism in wordpress. However one thing to note is that it depends on the caching plugin that is installed. So for example, if the plugin caching mechanism is memcache, the cache will be stored in memcache instead of in the db. Hence clearing the memcache from the plugin will clear [...]

PHP: usort magic

bpeh — Wed, 21 Dec 2011 02:02:19 +0000

usort is very useful when one wants to combine or manipulate the results especially received from the db. say for example we have an array named $displayProduct and we want to sort by the associative array call ‘order’ usort($displayProduct, function($a, $b) {return ($a['order'] < $b['order']) ? -1 : 1; });

quick magento tips

bpeh — Fri, 16 Dec 2011 01:36:39 +0000

// get user ip Mage::helper('core/http')->getRemoteAddr(true)); // get user session id Mage::getModel("core/session")->getEncryptedSessionId()); // update database config on the fly Mage::getModel('core/config')->saveConfig('payment/worldpaydirect/merchant_id', '1111111'); Mage::getConfig()->reinit(); Mage::app()->reinitStores();

wordpress caching and mobile theme plugins

bpeh — Wed, 14 Dec 2011 00:14:47 +0000

when using caching plugin such as w3tc in wordpress, it will try to cache the mobile version as well and there could be a possibility that mobile users might see the desktop version and vice versa. So the idea is to disable the caching plugin for mobile agents: if using w3tc, under page cache -> rejected [...]

clear dns cache in mac

bpeh — Fri, 02 Dec 2011 06:01:29 +0000

dns might not have been cleared when changing dns entries in the /etc/file. In mac, dscacheutil -flushcache

git: finding file changed since certain date and upload a server

bpeh — Wed, 23 Nov 2011 00:57:23 +0000

good old bash. git log -p --since={2011-11-01} | grep "diff --git" | awk '{print $3}' | sed 's/^a\///g' | sort -rn | uniq | while read s; do scp $s root@yourip:/server_path/$s; done;

Tips in Magento

bpeh — Thu, 10 Nov 2011 01:45:34 +0000

Debugging Tips: 1. In your .htaccess, add SetEnv MAGE_IS_DEVELOPER_MODE 2. Under system -> configuration -> advanced -> developer, change current configuration scope dropdown on top left to main website, then debug -> turn template hints and block name hints to on. 3. We can log errors easily. Mage::log($var); 4. To display popup errors, Mage::throwException(“Your debug message here”); 5. To see a list of [...]

Magento: Removing SSL After Installation

bpeh — Mon, 07 Nov 2011 01:12:29 +0000

use magento_db; UPDATE core_config_data SET value = 0 WHERE path=’web/secure/use_in_frontend’; UPDATE core_config_data SET value = 0 WHERE path=’web/secure/use_in_adminhtml’; might need to clear the cache and do hard refresh after that.

Magento: Adding Downloadable Product To A Bundle

bpeh — Thu, 03 Nov 2011 23:21:48 +0000

After googling for ages, I could not find an answer to bundling downloadable product, as in the downloadable product will not appear under the bundle items search section. After some tough digging, I noticed magento community version 1.6 only accepts virtual and simple product in a bundle. the config is at app/code/core/Mage/Bundle/etc/config.xml, about line 103. To get [...]

Turning on Mac keyboard Backlit

bpeh — Thu, 03 Nov 2011 22:41:28 +0000

If you find your mac keyboard not having any backlit, try apple -> system preferences -> keyboard -> illuminate keyboard in low light conditions. Then try covering your fingers over the camera, the keyboard should be lit up.

playing with cat and awk

bpeh — Wed, 05 Oct 2011 05:46:10 +0000

cat can print out line number and awk lets you format it. This combo is excellent to manipulate files creating a csv for eg. cat -n phpbook.csv | awk '{print $2","$1}' > phpbook1.csv

Removing sensitive data from git

bpeh — Thu, 22 Sep 2011 01:58:38 +0000

suppose one accidentally commited a file with sensitive data ages ago, others could actually retrieve the passwd easily since git keeps a history of the changes. So the idea is to remove the file from git altogether with file changed history, then recommit the affected file (without sensitive data this time) again. do a git [...]

vbulletin: getting user ip behind a proxy

bpeh — Tue, 06 Sep 2011 02:10:49 +0000

if vbulletin is behind a proxy, the ip of the user would be the ip of the proxy server instead of the ip of the user. Instead of hacking the includes/class_core.php file we can install the runkit extension, ie http://www.php.net/manual/en/runkit.installation.php then create a plugin consisting of the following: $vbulletin->ipaddress = $vbulletin->alt_ip; runkit_constant_redefine('IPADDRESS', $vbulletin->ipaddress);

change primary domain name in wordpress

bpeh — Thu, 01 Sep 2011 00:58:49 +0000

sometimes it may be necessary to change the domain name of your wordpress blog. Instead of reinstalling wordpress, we can modify the current database to accomodate the changes. run the following query: Back up your db. then use wordpress_db; update wp_site set domain='newdomain.com'; update wp_blogs set domain='newdomain.com'; update wp_options SET option_value = 'http://newdomain.com' WHERE wp_options.option_id =1; update wp_options SET option_value = [...]

Mac nvrm crashing

bpeh — Fri, 19 Aug 2011 03:38:33 +0000

Many people who bought macs in 2010 are experiencing random crashes with NVRM error. After a bit of digging, the problem could be drilled down into the nvidia card for the 2010 batch of macs. If you are using Nvidia Geforce GT 330M, you might be a victim as well. “A number of people with [...]

Git Submodule By Example

bpeh — Tue, 02 Aug 2011 03:03:12 +0000

If you have been working with version control system for a while, you would know or speculated about the possibility of including references from other projects into your project. From a programmer’s point of view, this feature is useful especially when you need to include code libraries owned by someone else or common header/footer [...]

simple function to truncate string to closest word

bpeh — Thu, 02 Jun 2011 05:31:21 +0000

as the title implies… this is in wordpress though. preg_replace is the trick here. function trim_excerpt() { $text = get_the_excerpt(); $limit = 200; if (strlen($text) > $limit) { $text = preg_replace('/\s+?(\S+)?$/', '', substr($text, 0, $limit)).'... '; } return $text; } add_filter("the_excerpt", "trim_excerpt");

compare file changed in different directories

bpeh — Tue, 24 May 2011 23:02:27 +0000

it might be useful to compare different directories for file changed. the unix diff command rocks. for example, this command compares 2 directories, ie blogs and blogs.bak recursively, output only the files changed and ignore any files named .git diff -qr -x .git blogs blogs.bak

Tips on rebuilding post cache in vbulletin

bpeh — Tue, 08 Mar 2011 02:10:49 +0000

Some plugins may modify the content of the forum post upon saving or displaying. Updating the post cache under vbulletin admin -> maintenance would not take that into consideration. The best way to update the post cache is to let it rebuilt itself when the page is being requested. To do that, we just need [...]