PHP Interpreter
Preferences
The PHP Interpreter preferences page allows you to set which PHP version
to use.
The PHP Interpreter
Preferences page is accessed from Window | Preferences | PHP | PHP Interpreter.

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To configure your PHP version:
Select the PHP Version to use. The default options
are PHP 4 or PHP 5 or greater. The PHP version chosen will affect the
internal debugger, code analyzer and code completion.
See PHP Support for more on what PHP
version settings affect.
Mark the "Use ASP tags as PHP tags"
checkbox in order for Code Completion to respond to ASP tags in the same
way as it responds to PHP tags.
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To use a different PHP Interpreter for a
specific project:
Select the link labelled "Configure Project
Specific Settings".
Select the specific project from the list.
Another PHP Interpreter preferences page will
open.

Mark the Enable project
specific settings checkbox.
Choose your PHP version.
Click Apply.
A prompt dialog will appear
stating that a rebuild of the project must occur for the settings to take
effect.
Click Yes to rebuild the
project. Error parsing will be performed according to the PHP version
chosen.
If you click No, the rebuild will be done when PDT is restarted.
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Click OK to apply your settings.