Frequent question: What is use of empty function in PHP Mcq?

The empty() function checks whether a variable is empty or not. This function returns false if the variable exists and is not empty, otherwise it returns true.

What is the use of isset () function in PHP?

The isset() function is an inbuilt function in PHP which checks whether a variable is set and is not NULL. This function also checks if a declared variable, array or array key has null value, if it does, isset() returns false, it returns true in all other possible cases.

What is the use of strlen () function in PHP Mcq?

Description: The strlen() function is predefined function of PHP. It is used to find the length of string or returns the length of a string including all the whitespaces and special character. 9) Which of the following is used for concatenation in PHP?

What is the correct way to create a function in PHP Mcq?

The declaration of a user-defined function starts with the word function, followed by the name of the function you want to create followed by parentheses i.e. () and finally place your function’s code between curly brackets {}.

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What is PHP full form?

PHP (recursive acronym for PHP: Hypertext Preprocessor ) is a widely-used open source general-purpose scripting language that is especially suited for web development and can be embedded into HTML.

What is $_ POST in PHP?

PHP $_POST is a PHP super global variable which is used to collect form data after submitting an HTML form with method=”post”. $_POST is also widely used to pass variables. The example below shows a form with an input field and a submit button.

What is the use of PHP files?

PHP is mainly focused on server-side scripting, so you can do anything any other CGI program can do, such as collect form data, generate dynamic page content, or send and receive cookies. But PHP can do much more. There are three main areas where PHP scripts are used. Server-side scripting.

What is difference between printf () and sprintf () in PHP?

Difference between sprintf() and printf() function in PHP

The common difference between sprintf() and printf() function is that sprintf() function display the text with the help of echo, whereas printf() function does not need the echo to display the text.

Why echo is used in PHP?

PHP echo statement can be used to print the string, multi-line strings, escaping characters, variable, array, etc. … echo is a statement, which is used to display the output. echo can be used with or without parentheses: echo(), and echo. echo does not return any value.

What is the correct way of declaring PHP variable?

PHP Variables

  • A variable starts with the $ sign, followed by the name of the variable.
  • A variable name must start with a letter or the underscore character.
  • A variable name cannot start with a number.
  • A variable name can only contain alpha-numeric characters and underscores (A-z, 0-9, and _ )
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Which operator is called a function in PHP?

Scope Resolution Operator (::) ¶

The Scope Resolution Operator (also called Paamayim Nekudotayim) or in simpler terms, the double colon, is a token that allows access to static, constant, and overridden properties or methods of a class.

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