Eclipse: PHPEclipse editor does not open?

When your PHPEclipse Editor does not open and tells you to look at the error log it is likely because you use the wrong JVM.

How to set the right JVM:

• Install the Sun Java JRE ((k)ubuntu: sudo apt-get install sun-java6-jre)
• In the file /etc/eclipse/java_home insert /usr/lib/jvm/java-6-sun on the line right above /usr/lib/jvm/java-gcj
• Start eclipse. It might find a new workspace - Just select the workspace you used with the old JVM.