Basic Php Question ?
- What is PHP?
- Personal Home Page
- Preprocessed Hypertext
- Practical Hypertext Processor
- Primary Hyperlink Programming
Answer: 3. Practical Hypertext Processor
2. What is the key difference between echo and print in PHP?
- echo is a language construct, while print is a function.
- print can be used with multiple parameters, while echo cannot.
- echo always returns a value, while print does not.
- print is used for printing variables, while echo is used for strings only.
Answer: 1. echo is a language construct, while print is a function.
3. What is the correct way to add comments in PHP?
// This is a comment/* This is a comment */# This is a comment- All of the above
Answer: . All of the above
4. What are the types of errors in PHP?
- Logical Errors
- Syntax Errors
- Runtime Errors
- All of the above
Answer: 4. All of the above
5. How do you declare a variable in PHP?
- variable $name;
- $name = “variable”;
- var $name = “variable”;
- declare $name = “variable
Answer: 2. $name = “variable”;
6. What is the key difference between include and require in PHP?
- require is used for files that are not essential, while include is for essential files.
- include produces a warning if the file is not found, while require produces a fatal error.
- include returns a boolean value, while require returns the included file content.
- There is no significant difference between include and require
Answer: 2. include produces a warning if the file is not found, while require produces a fatal error.
7.Explain the difference between == and === operators.
- == performs type coercion, while === does not.
- === checks only the values, while == checks both values and types.
- == checks only the values, while === checks both values and types.
- There is no difference between == and ===.
Answer: 3. == checks only the values, while === checks both values and types.
8. Which of the following are data types supported by PHP?
- Integer
- Float (Double)
- Boolean
- All of the above
Answer: 4. All of the above
9.What is the purpose of the if, else, and elseif statements in PHP?
- if is used for conditions, else is used for loops, and elseif is used for function declarations.
- if is used for conditions, else is executed if the condition is true, and elseif allows for additional conditions.
- if is used for loops, else is used for conditions, and elseif is used for array declarations.
- There is no significant difference between if, else, and elseif in PHP.
Answer: 2. if is used for conditions, else is executed if the condition is true, and elseif allows for additional conditions.
10.What is an object in PHP?
- An object is a variable that stores a single value.
- An object is a collection of related functions.
- An object is an instance of a class, representing a real-world entity with properties and methods.
- An object is a data type used for storing characters and strings.
Answer: 3. An object is an instance of a class, representing a real-world entity with properties and methods.
11. How do you create an indexed array and an associative array in PHP?
- $array = [1, 2, 3]; $assocArray = {“one”: 1, “two”: 2, “three”: 3};
- $array = array(1, 2, 3); $assocArray = array(“one” => 1, “two” => 2, “three” => 3);
- $array = [1, 2, 3]; $assocArray = [“one” => 1, “two” => 2, “three” => 3];
- $array = array(1, 2, 3); $assocArray = {“one” => 1, “two” => 2, “three” => 3};
Answer: 3. $array = [1, 2, 3]; $assocArray = [“one” => 1, “two” => 2, “three” => 3];
12. 12.What is the difference between array() and [] for creating arrays in PHP?
- array() is the only valid way to create arrays, while [] is not recognized in PHP.
- There is no difference; array() and [] can be used interchangeably to create arrays.
- [] is the shorthand syntax introduced in PHP 7, while array() is the traditional way to create arrays.
- array() can only create indexed arrays, while [] is used for associative arrays.
Answer: 3. [] is the shorthand syntax introduced in PHP 7, while array() is the traditional way to create arrays.