Which of the following is not a valid way to increment a variable in PHP?$var++;++$var;$var += 1;$var =+ 1

Which of the following is NOT a valid variable name in PHP?$_variable$1_variable$variable$my_variable

How would you add 1 to the variable $count?Select one:a.  incr count;           b.  $count =+1                       c. $count++;  d.  incr $count;

Which of the following is/are correct way(s) to increment variable p?  Tick all correct answer(s).  No partial marks and no negative marks.Select one or more:p++p=p+1p+++p

What is the correct way to add 1 to the $count variable?Question 17Select one:a.$count =+1b.++countc.count+;d.None of the above

What will the value of $x be at the end of this script?<?PHP$x=0;$x=$x+1;echo $x.” value”;$x++;?>