osticket error: IMAP doesn’t exist. PHP must be compiled with IMAP enabled.

On Ubuntu 14.04 LTS:

apt-get install php5-imap
php5enmod imap
service apache2 reload

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Posted by on February 8th, 2016 No Comments

Telldus net and NEXA PER-1500 remote controlled switch

The NEXA PER-1500 remote controlled switch works fine with Telldus net. This unit does not have a learn button. Instead it goes into learn mode for about 5 seconds when power is applied and that is indicated by the LED blinking. To add the NEXA to to Telldus Live:

  • The NEXA PER-1500 should be disconnected from power
  • Log in to Telldus live and add new device
  • Select NEXA -> Self learning on/off
  • Power on the NEXA PER-1500 and immidiately click the Learn button in Telldus Live. You might need to hit it a couple of times.
  • The NEXA PER-1500 will click it’s relay to verify the pairing

Troubleshooting:

  • The NEXA PER-1500 can be paired to maximum 6 devices. If you are not certain there is a free memory slot, clear all memories by using the remote control. Power on the NEXA PER-1500 and while the LED is blinking you hit ALL OFF on the remote control
  • When pairing the NEXA PER-1500 with Telldus net it needs to be very close to the unit (I paired it within 1 meter from it). When paired it will work on further distances.
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Posted by on February 2nd, 2016 No Comments

Joomla 1.5 PHP fatal error allowed memory size exhausted in libraries/joomla/error/exception.php [SOLUTION]

After a site move (from one webhosting to another) the site reported error 500 internal server error. When checking the logfile the file libraries/joomla/error/exception.php reported that allowed memor size was exhausted. I tried increasing it by adjusting the php.ini settings all the way up to 2 GB without resolving the problem. This is way more than Joomla should need.

The problem was that I had forgot to update the temp and log paths in Global settings to the ones on the new server. The path the site is running under can be found by the menu Help -> System info. Then I adjusted temp path and log path in Global settings and the problem was resolved.

If your site gives you error 500 internal server error, access your Joomla database using for example phpMyAdmin and delete all rows in the jos_session table.

Another solution if the problem is a corrupted database is to repair the database tables using phpMyAdmin.

In configuration.php, also try setting cache_handler=”file” instead of “memcache”.

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Posted by on February 1st, 2016 No Comments

Problem sending email on form submission in WordPress

Adding a form to your WordPress website is normally done by using a plugin for it, like Contact Form 7 for example. At some hosting providers, there can be a problem for the plugin to send emails to you when someone is posting through the form. To prevent spam through forms, many hosting providers disable the PHP mail function that is used in WordPress to send emails, causing for example form plugins not being able to send emails.

The solution is to set up WordPress to use SMTP, preferrably with authentication, to send the emails through a real email server. To do this you need a plugin like WP Mail SMTP. Set it up either with the hosting provider’s SMTP server or use the one you normally use for email.

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Posted by on January 27th, 2016 No Comments

PHP Parse error: syntax error, unexpected end of file in XXXXX.php

  • Check that you have spaces around curly braces, i.e. for example don’t use <?php}?> but instead use <?php } ?>
  • If your script has been running without problems on earlier versions of PHP but you are now running PHP 5.4 or later, replace all occurrences of <? with <?php
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Posted by on January 10th, 2016 No Comments

Joomla 3.4 too many redirects (303)

On a Joomla site currently in offline mode the front page gave us “too many redirects” error. It turned out the reason was the article connected to the home page menu item had been unpublished. By publishing the article the problem wsa solved.

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Posted by on December 21st, 2015 No Comments

Vivotek PT7137 rtsp stream to webpage using VLC plugin

One way of getting the video from Vivotek PT7137 to a webpage is by using the VLC plugin and connect the rtsp stream.

However, in current version of Chrome the VLC plugin is no longer supported. Instead it is suggested to use HTML5 to embed video, but rtsp is not supported in Chrome so it is kind of a dead end there for the moment. This solution works in for example Firefox.

In the webpage where you would like to add the stream:

<object classid=”clsid:9BE31822-FDAD-461B-AD51-BE1D1C159921″ codebase=”http://download.videolan.org/pub/videolan/vlc/last/win32/axvlc.cab” id=”vlc”>
</object>
<embed type=”application/x-vlc-plugin” pluginspage=”http://www.videolan.org” autoplay=”yes” loop=”no” width=”600″ height=”340″ target=”rtsp://USERNAME:PASSWORD@IPADDRESS:554/live.sdp” />

Replace USERNAME, PASSWORD and IPADRESS with real values for your Vivotek PT7137 camera. It might be a good idea to create an account in the Vivotek PT7137 to use from the web as the username and password will be visible for anyone who inspects the webpage source code. That said, putting the root user account and password here would be considered stupid :)

Tip for Joomla users: If you include this code in a Joomla site, include {emailcloak=off} before the above, because the @-sign will trig Joomla email cloaking beliving it is an email address.

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Posted by on December 8th, 2015 No Comments

CSS background-position not working on Android Mozilla

In order to position a background image inside a div I tried to use the CSS3:

background-position: right 10px center;

The goal was to position the background image to the right of a div container, 10px from the right edge and vertically centered. This worked fine in most browsers. However, in the Android devices using the native Mozilla browser the background was positioned at 0,0 (i.e. left top).

The solution was to use:

background-position: right center;

and edit the background image where I added 10 px of extra transparent space into the image.

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Posted by on December 1st, 2015 No Comments

How to convert a SVG (scalable vector graphics) image to PNG

This method aims at Windows users but similar methods are probably also useable in other environments.

  1. Right click on the SVG image file and select Open with
  2. Select Internet Explorer
  3. In Internet Explorer right click on the image and select Save image as
  4. In the File Format box switch from Scalable Vector Graphics (*.svg) to PNG (*.png) 
  5. Click Save
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Posted by on November 17th, 2015 No Comments

Cron scripts in /etc/cron.daily not running

If you put a script to be run by cron in cron.hourly, cron.daily, cron.weekly or cron.monthly but they won’t run, make sure that they:

  • Are chmod +x
  • Are owned by the correct user (like root:root)
  • Start with #!/bin/sh or the corresponding shell used to execute them
  • The filename doesn’t contain any dots, like a script name ending in .sh will not execute

You can also execute the command to verify that your script will be run:

run-parts –test /etc/cron.daily

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Posted by on October 6th, 2015 No Comments