( ! ) Warning: Undefined variable $aa in /home/homes/leaseibel/sites/developpement/php/Notions by Hakim/exemple_erreur/undifined.php on line 6
Call Stack
#	Time	Memory	Function	Location
1	0.0114	358944	{main}( )	.../undifined.php:0

( ! ) Warning: Undefined global variable $_SESSION in /home/homes/leaseibel/sites/developpement/php/Notions by Hakim/exemple_erreur/undifined.php on line 13
Call Stack
#	Time	Memory	Function	Location
1	0.0114	358944	{main}( )	.../undifined.php:0

( ! ) Warning: Trying to access array offset on value of type null in /home/homes/leaseibel/sites/developpement/php/Notions by Hakim/exemple_erreur/undifined.php on line 13
Call Stack
#	Time	Memory	Function	Location
1	0.0114	358944	{main}( )	.../undifined.php:0