Archive for February, 2010

 

PHP htmlspecialchars_decode doesn’t handle nordic/german characters like å, ä and ö

The PHP functions htmlspecialchars and it’s reverse htmlspecialchars_decode only handles the following characters:

  • ‘&’ (ampersand) becomes ‘&’
  • ‘”‘ (double quote) becomes ‘"’ when ENT_NOQUOTES is not set.
  • ”’ (single quote) becomes ‘'’ only when ENT_QUOTES is set.
  • ‘<‘ (less than) becomes ‘&lt;’
  • ‘>’ (greater than) becomes ‘&gt;’

If you want to output html text containing nordic/german characters like Å, Ä, Ö and Ü in dialog boxes (popups) these characters also needs to be converted. The following PHP function does this for you:

function unhtml( $string ) {
$string = str_replace ( '&amp;', '&', $string );
$string = str_replace ( '&#039;', '\'', $string );
$string = str_replace ( '&quot;', '"', $string );
$string = str_replace ( '&lt;', '<', $string );
$string = str_replace ( '&gt;', '>', $string );
$string = str_replace ( '&uuml;', 'ü', $string );
$string = str_replace ( '&Uuml;', 'Ü', $string );
$string = str_replace ( '&auml;', 'ä', $string );
$string = str_replace ( '&Auml;', 'Ä', $string );
$string = str_replace ( '&ouml;', 'ö', $string );
$string = str_replace ( '&Ouml;', 'Ö', $string );
$string = str_replace ( '&aring;', 'å', $string );
$string = str_replace ( '&Aring;', 'Å', $string );
return $string;
}

It is important that the code is saved in UTF-8 encoding (or the format your web page is using). Edit the code in for example Windows notedpad and use Save as. Now you can select UTF-8 encoding when saving the file.

Or if you are using UNIX / Linux you can use iconv to convert the file if it is not already in the correct format. First, to find out the current encoding for your file, use the file command:

$ file --mime-encoding unhtml.php
unhtml.php: iso-8859-1

Now, to convert it to UTF-8 using the iconv command:

iconv -f iso-8859-1 -t utf-8 unhtml.php > unhtml-utf-8.php

The reverse of unhtml is of course the html function:

/* Encodes specific characters for display as html */
function html($string) {
  $string = str_replace ( '&', '&amp;', $string );
  $string = str_replace ( '\'', '&#039;', $string );
  $string = str_replace ( '"', '&quot;', $string );
  $string = str_replace ( '<', '&lt;', $string );
  $string = str_replace ( '>', '&gt;', $string );
  $string = str_replace ( 'ü', '&uuml;', $string );
  $string = str_replace ( 'Ü', '&Uuml;', $string );
  $string = str_replace ( 'ä', '&auml;', $string );
  $string = str_replace ( 'Ä', '&Auml;', $string );
  $string = str_replace ( 'ö', '&ouml;', $string );
  $string = str_replace ( 'Ö', '&Ouml;', $string );
  $string = str_replace ( 'å', '&aring;', $string );
  $string = str_replace ( 'Å', '&Aring;', $string );
  return $string;
}
?>
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Posted by on February 26th, 2010 3 Comments

TYPO3 cms installation fails in step 2

If you are installing the TYPO3 content management system (CMS), after uploading the files to your web server and setting some directory permissions, you are supposed to point your browser to your web server’s root where you just have installed TYPO3 in order to continue the installation. A screen similar to this is displayed:

TYPO3 installation step 1

Click to enlarge

Enter database username, password and server (normally “localhost”) and click continue. If the following screen (as step 2) is displayed, you are in trouble:

TYPO3 installation step 2

Click to enlarge

This screen is supposed to show you the availible databases for selection. But as you can see it ends just below the word “Database”. No error message is displayed.

The reason for this is that PHP is running in Safe mode. By configuring your webserver/PHP to run with Safe mode off the installation will work.

This situation is actually described in the TYPO3 Wiki under troubleshooting saying “This could cause the Install Tool to display an error message”. In my case it didn’t and it took some time of head scratching to figure it out.

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Posted by on February 16th, 2010 No Comments

How to find out what Debian version a system is running

Just issue the command:

# cat /etc/debian_version
squeeze/sid 
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Posted by on February 15th, 2010 No Comments

How to find out what Ubuntu version a system is running

There are two ways:

# cat /etc/issue
Ubuntu 9.10 \n \l

or

# lsb_release -a
Distributor ID:    Ubuntu
Description:    Ubuntu 9.10
Release:    9.10
Codename:    karmic

The latter is slower but gives more information.

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Posted by on February 5th, 2010 No Comments

Google streets – now in Sweden and Denmark

Until recently Google streets has not been availible for Sweden and Denmark. There has been local sites with a similar function, like http://hitta.se/gatubild. But now you can also use Google streets for your virtual tour to Sweden and Denmark. Not only the large cities but also smaller villages and country roads can be seen in Google streets.

To use Google streets go to maps.google.com, find your place of interest, click and hold the little orange man that stands just above the zoom handle and put him down on the street you want to visit. Streets with photos will get blue borders when you lift the little man and you can of course only put him down on such streets.

(more…)

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Posted by on February 1st, 2010 No Comments