Read the following two books
PHP 5 Unleashed
By John Coggeshall

Publisher : Sams Publishing
Pub Date : December 28, 2004
Print ISBN : 0-672-32511-X
Pages : 840

and


Sams Teach Yourself PHP, MySQL® and Apache All in One
By Julie C. Meloni

Publisher : Sams Publishing
Pub Date : December 18, 2003
ISBN : 0-672-32620-5
Pages : 624

There is no such more number of institutions in most of the cities which has been providing coaching,i think u may go through the above books to learn about PHP.