State whether the statement is true or false. TRUE is A and FALSE is B All Web pages containing PHP code must have an extension of .php. $ _ABC 1 is a valid variable identifier. In PHP, you can declare a variable without assigning a value to it. Constant names, like variable names, must begin with a $. Array names arc often referred to with the array operators [and] at the end of the name to clearly define them as arrays. The numbering of elements within an array starts with an index number of one (1) A unary operator requires an operand before or after the operator. A comparison operator returns a Boolean value of TRUE or FALSE after two operands have been compared. A return statement is a statement that returns n value to the statement that called the function. Variable scope refers to the location that a declared variable can he used. In PHP, you must declare a global variable with the global keyword inside a function definition for the variable to be available within the scope of that function. When one decision-making statement is contained within another decision-making statement, they are referred to as multiple decision-making structures. The switch statement controls program flow by executing a specific set of statements, depending on value of an expression. The concatenation assignment operator (, -) combines two text strings. The str_word_count () function returns the number of digits in a string. The strtok () function breaks a program into functions. The syntax for the strtok() function is $ variable-strtok(string, seperators) The explode () function splits a string into an indexed array at a specified separator