State whether the statement is true or false. TRUE is A and FALSE is B All Web p
ID: 3799247 • Letter: S
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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.Explanation / Answer
Q.1 The statement is true i.e. A because whenever a request is made for a document that PHP code and contains an extension of .php, the web server sends the file to the scripting engine for processing.then the scripting engine encounters PHP code.the web servers then return the results of the PHP script.
Q.2 $_ABC1 is not a valid variable identifier because an identifier cannot begin with special characters such dollar($) symbol except underscore(_),it can only begin with alphabets a-z and A-Z,so the answer is false i.e. B.
Q.3 this statement is True i.e. A because we can declare a variable without assigning a value to it in PHP by assigning to the constant NULL. NULL is the only possible value of type null which represents a variable with no value.
Q.4 This statement is false i.e. B because all variable names must begin with a letter of the alphabet, an underscore, or ( _ ), or a dollar sign ($). The convention is to always use a letter of the alphabet. The dollar sign and the underscore are discouraged.
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