var_dump() and print_r() display null in php

1. What do the PHP functions Var_dump () and Print_r () do?
2. What is Var_dump function in PHP?
3. What does Print_r do in PHP?
4. What value will Var_dump show that Echo will not show in PHP?
5. What is difference between ECHO and Print_r in PHP?
6. What is the main function of Var_dump () function?
7. How do I debug PHP?
8. What is Isset PHP?
9. What is basic PHP syntax?
10. What is role of $_ GET in PHP?
11. How for each loop works in PHP?
12. Is PHP an array?

What do the PHP functions Var_dump () and Print_r () do?

The var_dump function displays structured information about variables/expressions including its type and value. ... The print_r() displays information about a variable in a way that's readable by humans. array values will be presented in a format that shows keys and elements.

What is Var_dump function in PHP?

The var_dump() function dumps information about one or more variables. The information holds type and value of the variable(s).

What does Print_r do in PHP?

The print_r() function is a built-in function in PHP and is used to print or display information stored in a variable.

What value will Var_dump show that Echo will not show in PHP?

Explanation: In Php the var-dump function is used for displaying the datatype as well the value . The var-dump () does not return anythings it means there is no datatype of var-dump() function.

What is difference between ECHO and Print_r in PHP?

The print and echo are both language constructs to display strings. The echo has a void return type, whereas print has a return value of 1 so it can be used in expressions. The print_r is used to display human-readable information about a variable.

What is the main function of Var_dump () function?

The var_dump() function is used to dump information about a variable. This function displays structured information such as type and value of the given variable. Arrays and objects are explored recursively with values indented to show structure.

How do I debug PHP?

Here are the steps to doing PHP programming:

1. Check for PHP extensions in VS Code.
2. Install the PHP Debug extension.
3. Click “reload” to reload VS Code.
4. Install Xdebug. ...
5. Now when you have the right version, put it in the PHP/ext directory.
6. Next, you need to configure PHP to use the extension and allow remote debugging.

What is Isset PHP?

The isset() function checks whether a variable is set, which means that it has to be declared and is not NULL. This function returns true if the variable exists and is not NULL, otherwise it returns false.

What is basic PHP syntax?

A PHP script can be placed anywhere in the document. A PHP file normally contains HTML tags, and some PHP scripting code. ...

What is role of $_ GET in PHP?

PHP $_GET is a PHP super global variable which is used to collect form data after submitting an HTML form with method="get". $_GET can also collect data sent in the URL.

How for each loop works in PHP?

For every loop iteration, the value of the current array element is assigned to $value and the array pointer is moved by one, until it reaches the last array element.

Is PHP an array?

The is_array() is an inbuilt function in PHP. The is_array() function is used to check whether a variable is an array or not. ... Return value: It is a boolean function so returns TRUE when $variable_name is a boolean value, otherwise FALSE. Below example illustrate the is_array() function in PHP.