[FPDF] Génération de tableaux

Bonjour j'ai utilisé le tuto
http://jc-cornic.developpez.com/tutoriels/php/pdf/
mais il m'affiche ce message d'erreur :

Strict Standards: Declaration of phpToPDF::AddPage() should be compatible with that of FPDF::AddPage() in C:\xampp\htdocs\testes\phpToPDF.php on line 44

Warning: include(helveticab.php) [function.include]: failed to open stream: No such file or directory in C:\xampp\php\PEAR\fpdf.php on line 541

Warning: include() [function.include]: Failed opening 'helveticab.php' for inclusion (include_path='.;C:\xampp\php\PEAR') in C:\xampp\php\PEAR\fpdf.php on line 541
FPDF error: Could not include font metric file


Quelqu'un a une solution s'il vous plait?