Fatal error: Call to undefined function subtr() in /home/elmar/public_html/pear/Structures_BibTex/BibTex.php on line 333

Call Stack:
    0.0002      44032   1. {main}() /home/elmar/public_html/bibtex/tests/bibs/create.php:0
    0.0067     436720   2. Structures_BibTex->parse() /home/elmar/public_html/bibtex/tests/bibs/create.php:10
    0.4540     482704   3. Structures_BibTex->_parseEntry() /home/elmar/public_html/pear/Structures_BibTex/BibTex.php:232