How do you execute a PHP script from the command line?

Run the command php script.php
Use the execute script.php command
Type run script.php
Execute the script.php command

To execute a PHP script from the command line, you can use the command php script.php, where script.php is the name of your PHP file. This command runs the PHP interpreter, reads and executes the code in the specified file. It allows you to run PHP scripts outside of a web server environment, enabling command-line applications or batch processing tasks.

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You are writing a PHP script and you need to filter multiple inputs. How would you do this?

Use the filter_input_array() function with the appropriate filters and input types
Use the filter_var_array() function with the appropriate filters and input types
Loop through the input values and apply the desired filters and validations individually
All of the above

To filter multiple inputs in a PHP script, you can use either the filter_input_array() function or the filter_var_array() function. Both functions allow you to specify the filters and input types to apply to the multiple inputs. You can loop through the input values and apply the desired filters and validations individually as well. All of the mentioned options are valid approaches to filter multiple inputs in PHP. For further details, refer to the PHP documentation on filter_input_array() (http://php.net/manual/en/function.filter-input-array.php) and filter_var_array() (http://php.net/manual/en/function.filter-var-array.php).

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How do you define a destructor in a PHP class?

Using the __destruct() method
Using the destroy() method
Using the delete() method
Using the finalize() method

In PHP, you can define a destructor in a class using the __destruct() method. The correct option is "Using the __destruct() method." This special method is automatically called when an object is no longer referenced or explicitly destroyed. It is used to perform any necessary cleanup tasks or deallocate resources held by the object. For further details, refer to the PHP documentation on destructors: https://www.php.net/manual/en/language.oop5.decon.php#language.oop5.decon.destruct

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Which of the following are valid ways to add comments to PHP code?

// This is a comment
# This is a comment
/* This is a comment */
All of the above

PHP supports different ways to add comments. Single-line comments can be denoted with double slashes (//) or a hash symbol (#) at the beginning of a line. Multi-line comments can be enclosed between /* and */. All of the provided options are valid ways to add comments to PHP code. Learn more: https://www.php.net/manual/en/language.basic-syntax.comments.php

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To access an element of an indexed array in PHP, you use the name of the array followed by the ______ of the element in square brackets.

Key
Index
Value
Identifier

To access an element of an indexed array in PHP, you use the name of the array followed by the index of the element in square brackets. The index represents the numeric key associated with the element. For example, to access the first element of an indexed array, you would use the index 0. To access the second element, you would use the index 1, and so on. By specifying the index within the square brackets ([]), you can retrieve the corresponding element. Learn more: https://www.php.net/manual/en/language.types.array.php#language.types.array.syntax

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In PHP, you can define an interface using the interface keyword like interface InterfaceName { ______ }.

public methods and properties
abstract methods and properties
private methods and properties
static methods and properties

In PHP, to define an interface, you can indeed use the interface keyword followed by the name of the interface. For example: interface InterfaceName { } An interface contains method signatures without implementation and can also define constants. Interfaces establish a contract that classes must adhere to when implementing the interface. Classes that implement an interface must provide an implementation for all the methods defined in the interface. To learn more about interfaces in PHP, refer to: http://php.net/manual/en/language.oop5.interfaces.php

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You've written a PHP script, but it's not executing correctly. You suspect there's a syntax error. How would you go about debugging this?

Run the script with a PHP interpreter and look for error messages.
Check the PHP error log file.
Use a PHP linter to check for syntax errors.
All of the above.

PHP offers several ways to debug scripts. Running the script with a PHP interpreter can reveal error messages that can help identify the problem. PHP also maintains an error log file that you can check for errors. Furthermore, using a PHP linter or a similar code checking tool can help identify syntax errors in your script. Learn more: https://www.php.net/manual/en/book.errorfunc.php

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How can you filter multiple inputs in PHP?

filter_var()
sanitize_input()
validate_input()
filter_input_array()

The filter_input_array() function in PHP is used to filter multiple inputs at once. It takes an input array and applies a specified filter to each element of the array. To learn more, refer to: http://php.net/manual/en/function.filter-input-array.php

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What is the purpose of the array_search() function in PHP?

To search for a value in an array
To sort the elements of an array
To filter the elements of an array
To count the number of elements in an array

The array_search() function in PHP is used to search for a specific value in an array and return the corresponding key if found. It performs a linear search through the array and returns the key of the first matching element or false if the value is not found. Learn more: http://php.net/manual/en/function.array-search.php

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What are the differences between an abstract class and a regular class in PHP?

Instantiation: An abstract class cannot be instantiated directly, while a regular class can be instantiated.
Method Requirements: An abstract class can have abstract methods that must be implemented in subclasses, while a regular class can have only concrete methods.
Purpose: An abstract class serves as a blueprint for other classes, whereas a regular class can be used independently without inheritance.
Properties: An abstract class can contain properties that are not allowed in a regular class.
All the options

Abstract classes and regular classes in PHP have some notable differences. Abstract classes cannot be instantiated directly, whereas regular classes can be instantiated to create objects. Abstract classes are meant to be extended by other classes, while regular classes can be instantiated and used independently. Abstract classes may contain abstract methods without implementation, while regular classes typically have all their methods implemented. These distinctions define the nature and purpose of each type of class in PHP OOP. To know more, refer to: http://php.net/manual/en/language.oop5.abstract.php

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