fgm/php__symfony__book: FGM's version of the code suggested in the SF4 book. @ f1d45114c9ae2e1808d747f24f695fe7df44f12c

Frederic G. MARAND 7028984486 ORM: using param converters, updating, deleting.		6 lat temu
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index.html.twig	7028984486 ORM: using param converters, updating, deleting.	6 lat temu
product.html.twig	7028984486 ORM: using param converters, updating, deleting.	6 lat temu