Q 2 - Which of the following is correct about constants vs variables in PHP? a. var b. define c. echo d. pushpin. B - Only scalar data (boolean, integer, float and string) can be contained in constants. Object. 8. name: we define the name of the PHP constant, following the rules above. This section contains Aptitude Questions and Answers on PHP Class Constants. For example, the value of __LINE__ depends on the line that it's used on in your script. » Subscribe through email. » DBMS Yes, we can create a case-sensitive constant in PHP. The name of the constant can be redefined? B - Constants cannot be defined by O simple assignment, they may only be defined using the define() function. 4. Notice: Use of undefined constant MY_CONSTANT - assumed 'MY_CONSTANT' in test.php on line x » Privacy policy, STUDENT'S SECTION 13) What is the correct output of the given code snippets? These magic … » Cloud Computing Four options are given to the each question and only one options is the correct one. Here is an example: // Declare constant pi define( 'pi', 3.14, true ); if( defined( 'pi' ) == true ) echo "Constant 'pi' is declared! This is new Multiple Choice Questions (MCQ Questions) of PHP with Answer on the Category of PHP (Php Hypertext Preprocessor). There is no need to use the '$' symbol with constants. » DS These constants are called magic constants. Look at the example in which we will PHP define constant. Which of the following is a PHP function used to declare constants? » JavaScript Learn vocabulary, terms, and more with flashcards, games, and other study tools. If constants don't work, just use variables. » Embedded C The above code will print "0" on the webpage because the COUNTRY constant is not defined. ; case-insensitive: we choose (True/False) whether a constant PHP script is case-insensitive.If we skip it, the constant is case-sensitive by default. » CSS Second, even if WP_DEBUG is true, the other constants only do something if they too are set to true. Constants are supposed to be just that, constant values, on every execution. This is new Multiple Choice Questions (MCQ Questions) of PHP with Answer on the Category of PHP (Php Hypertext Preprocessor). A - Constants may be defined and accessed anywhere without regard to variable scoping rules. Let us see how it is used in a program. Multiple choice questions on PHP topic Constants and Operators in PHP. Best answer. Aptitude Questions and Answers » PHP constants are case sensitive by default. The above code will generate an error because it is not the correct way to define a constant array. 9) What is the correct output of the given code snippets? Resource. Web Technologies: » C » Feedback 11) What is the correct output of the given code snippets? Interview que. » LinkedIn » C#.Net php; » Articles » HR All given statements are correct about the constants in PHP. Class constants are looks like class variables but its value cannot be changed. Select your option and check with given correct answer. » C C - Both of the above. PHP Constants. PHP Aptitude Questions and Answers, PHP Constants Aptitude Questions and Answers: This section contains aptitude questions and answers on PHP Constants. Rules for defining constant. 15) What is the correct output of the given code snippets? PHP constants can be defined by 2 ways: Using define() function; Using const keyword; Constants are similar to the variable except once they defined, they can never be undefined or changed. Start studying PHP. 12) What is the correct output of the given code snippets? o¿~ýú÷ µ¨ÿb>ûöíÓ{¯^=ºïÙµK]§mÛ´n¹kÓÆ;m¿myÇúQ½b)Wï®Ï²öø(–MŠËÕ[5ܶ8ì=pÐ>û¼ï¾Cª†B­X3“ûî;xð>û¸÷€~}{ïÕsÏ®ë:´kÓºE³âÙ¶áV[W¬Mª+Hå YŸãã{ÕÛÕÚ. A - There is no need to write a dollar Osign ($) before a constant, where as in Variable one has to write a dollar sign. Something like "this->time = time()" would even totally defy the purpose of a constant. Magic constants begin with two underscores and end with two underscores. » Java The define() function is used to define a constant in PHP. » DBMS View Notes - PHP Conditional statements.docx from COMPUTER S 123A at Rayat Bahra College Of Engineering & Bio-Technology for Women. The PHP directives, whatever they are, will prevail. Strings. This section contains Aptitude Questions and Answers on PHP Constants. 3) Can we create a case-sensitive constant in PHP? As of PHP 5.3 there are two ways to define constants: Either using the const keyword or using the define() function: const FOO = 'BAR' ; define( 'FOO' , 'BAR' ); They are not supposed to change every time a script runs or a class is instantiated. A valid constant name starts with a letter or underscore (no $ sign before the constant name). So this way, we can use the PHP Variables and Constants in our PHP programming. » About us statement termination. A constant is an identifier (name) for a simple value. » DOS PHP Constants: A constant is an … answered Sep 2, 2018 by Djurdjic . » Android Submitted by Nidhi, on May 23, 2020. 7) What is the correct output of the given code snippets? Q 25 - Which of the following is correct about constants? 1. always use function constant('CONST_NAME') to get constant value (BTW it also works for class constants - constant('CLASS_NAME::CONST_NAME') ); 2. use only class constants (that are defined inside of class using keyword const) because they are not converted to string when not found but throw exception instead (Fatal error: Undefined class constant). Following is a brief version history of CONSTANTS in PHP: As of PHP 5.3, you can use the const keyword to define global constants (previously, const keyword is used to create class constants). Which of the following is correct about constants vs variables in PHP? A valid constant name starts with an alphabet or underscore. The above code will print "INDIA" on the webpage. Array. 0 votes. » Linux Constants are just like variables, but its value cannot be changed. The above code will print "100" on the webpage. PHP constants follow the same PHP variable rules. https://wordpress.org/support/article/configuring-automatic-background-updates In many languages, constants are faster than variables and so are recommended, but this is not the case as much in PHP - although they are perhaps a small amount faster, the primary advantage to using constants is the fact that they do not have a dollar sign at the … C Both of the above. » Networks Home » To verify the existence of constants you can use the function defined. Array. & ans. Yes. However, when we do this we get the following notice about using an undefined constant and that PHP has cast it as a string. B To retrieve the value of a constant, you have to simply specify its name. The above code will print "AUSTRALIA" on the webpage. All the above; Options: A and B; B and C; A and C; D » Kotlin In this Question set you will get 10 Objective Questions of PHP with Answer related to PHP (Php Hypertext Preprocessor). The above code will print INDIA on the webpage. If the constant is defined then this will equal false. Boolean. » Java The above code will generate an error because redefine() is not an inbuilt function in PHP. There is no need to use the '$' symbol with constants. We can enable case insensitivity while defining constants. If it is … As of PHP 7, array constants can also be defined using define () function. » Java Which of the following is a special data type? Note: Unlike variables, constants are automatically global across the entire script. Practice these MCQ questions and answers for preparation of various competitive and entrance exams. 5. Resource. Naming Conventions for PHP Constants Name of constants must follow the same rules as variable names, which means a valid constant name must starts with a letter or underscore, followed by any number of letters, numbers or underscores with one exception: … Integer. » CS Organizations Constants are particularly useful for defining a value that you frequently need to refer to that does not ever change. » Internship "; // Script output "Constant 'pi' is declared!" » Node.js If they are set to false, the PHP directives remain unchanged. Languages: » Data Structure Conclusion: Don't try to reinvent constants as variables. In this Question set you will get 10 Objective Questions of PHP with Answer related to PHP (Php Hypertext Preprocessor). » CS Basics asked Sep 2, 2018 in Computer Science & Information Technology by Logic 1 flag. ... What is the purpose of the semicolon in PHP? 1) There are the following statements that are given below, which of them are correct about constants in PHP? CS Subjects: » C PHP MOCK TEST Q 1 - Which of the following is correct about constants? A directory of Objective Type Questions covering all the Computer Science subjects. » C++ A - Unlike with variables, you do not need to have a constant with a $. » Python PHP Objective type Questions and Answers. Write the following code in index.php … More: 14) What is the correct output of the given code snippets? 2) Which of the following function is used to define a constant in PHP? » Content Writers of the Month, SUBSCRIBE 5) What is the correct output of the given code snippets? Except for ‘error_reporting’, WordPress will set this to 4983 if WP_DEBUG is defined as false. 4) What is the correct output of the given code snippets? They remain constant across the entire program. In a previous tutorial, we have seen about PHP variable which is completely differed from constants. Which of the following is a Scalar data type? & ans. var_dump (MY_CONSTANT === 'MY_CONSTANT'); // true if constant not set. A valid constant name starts with an alphabet or underscore. Each define() parameter explained:. © https://www.includehelp.com some rights reserved. Solved programs: B - Once the Constants have been set, may not be redefined or undefined. The above code will not print anything on the webpage because fun() is not called anywhere in the code. » SEO 7. » C# 1) There are the following statements that are given below, which of them are correct about constants in PHP? 10) What is the correct output of the given code snippets? B - Only scalar data (boolean, integer, float and string) can be contained in constants. First we will see the case-sensitive constant. Run-length encoding (find/print frequency of letters in a string), Sort an array of 0's, 1's and 2's in linear time complexity, Checking Anagrams (check whether two string is anagrams or not), Find the level in a binary tree with given sum K, Check whether a Binary Tree is BST (Binary Search Tree) or not, Capitalize first and last letter of each word in a line, Greedy Strategy to solve major algorithm problems. Constants are defined using PHP's define( ) function, which accepts two arguments: The name of the constant, and its value. Predefined constants PHP Which of the following is correct about constants in PHP? operating-systems-and-servers; 0 Answers +1 vote. » Puzzles » PHP The false value of third parameter of define() function denotes that the constant name is case-sensitive and true value indicates that the constant name is case-insensitive. The following section describes some of the most useful magical PHP constants… FILE__: This magic constant returns the full path of the executed file, where the file is stored. 6. 943 views. » Machine learning Which of the following is an example of a short-style PHP tag? » Facebook A PHP constant is the opposite of a variable in that once it has been defined it cannot be changed. This function takes two parameters first is the name and second is the value of the constant defined. » C++ Resource. 1) There are the following statements that are given below, which of them are correct about class constants in PHP? » News/Updates, ABOUT SECTION : PHP is a scripting language PHP is a scripting language GREETING_TESt PHP is a scripting language PHP is a scripting language GREETING_TEST. PHP contains some special constants named as magic constants. PHP Constants are variables whose values once defined cannot be changed and these constants are defined without a $ sign in the beginning. » C++ STL Use Constants for values that remain fixed and referenced multiple times. » Ajax Select your option and check with given correct answer. For example, you might define a constant called INCHES_PER_YARD that contains the number of inches in a yard. Then a === b will return true, otherwise false. 8) What is the correct output of the given code snippets? For example, the PHP constant M_PI holds the mathematical constant Pi. Name of constants must follow the same rules as variable names, which means a valid constant name must starts with a letter or underscore, followed by any number of letters, numbers or underscores with one exception: the $ prefix is not required for constant names. Object. Aptitude que. Boolean. 6) What is the correct output of the given code snippets? : A - Unlike with variables, you do not need to have a constant with a $. The value cannot be changed during the script. If ‘a’ and ‘b’ are two constant arrays that have the same key and value pairs that are in the same order and are of the same types. What will be the output of the following PHP code ? Four options are given to the each question and only one options is the correct one. » C++ This is demonstrated below: Explanation of PHP 7 Code Here, we used the PHP 7 define function to declare one constants array ‘Canada’ which has 4 elements. ; value: we declare the value (scalar data only) of the constant. Which of the following is a Compound data type? » Java » Certificates The following code displays this value: echo M_PI; Another useful predefined constant is PHP_VERSION, which holds the current version of the running PHP engine: echo PHP_VERSION; The PHP website has a list of built-in predefined constants. No. This function returns true, if the constant was declared. » Embedded Systems Float. » SQL PHP Constants are created using define () function. Which of the following is a PHP function used to declare constants? Constants are just like variables, but its value cannot be changed. Which of the following PHP data types stores only true or false values? D None of the above. Select from the options above. A To define a constant you have to use define() function. Conventionally, constants should have uppercase letters and should start with the underscore ( _ ) or a letter. The above code will print the "country" on the webpage. Define. » Contact us » Web programming/HTML Float. » C » O.S. D - None of the above. As of PHP 5.6, it is possible to define an array constant by using const keyword.

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