BibTeX, biblatex and biber ⇒ How to unescape a BibTeX escaped string ?

[samax]

Hello,
I'm creating a PHP BibTeX Management class, which parse BibTeX files and put it into a MySQL database, but I've a problem to unescape the content of the fields of these files.

Can somebody help me to find a documentation page which lists all the different possible escapes which can be used in a BibTeX files, or a script which already do the unescaping ?

Thank you in advance for your help!