Warning: Undefined variable $x in %s on line %d
Attempt to assign property "a" on null

Warning: Undefined variable $x in %s on line %d
Attempt to modify property "a" on null

Warning: Undefined variable $x in %s on line %d
Attempt to increment/decrement property "a" on null

Warning: Undefined variable $x in %s on line %d
Attempt to modify property "a" on null

Warning: Undefined variable $x in %s on line %d
Attempt to assign property "a" on null

Warning: Undefined variable $x in %s on line %d
Attempt to modify property "a" on null

Warning: Undefined variable $x in %s on line %d

Warning: Undefined variable $x in %s on line %d

Warning: Undefined variable $x in %s on line %d

Warning: Undefined array key 0 in %s on line %d

Warning: Undefined variable $x in %s on line %d

Warning: Undefined array key 0 in %s on line %d

Warning: Undefined array key 0 in %s on line %d

Warning: Undefined variable $x in %s on line %d

Warning: Undefined array key 0 in %s on line %d

Warning: Undefined variable $x in %s on line %d

Warning: Undefined array key 0 in %s on line %d

Warning: Undefined array key 0 in %s on line %d

Warning: Undefined variable $x in %s on line %d
NULL