What is the use of the function ‘imagetypes()’?
imagetypes() gives the image format and types supported by the current version of GD-PHP.
What is needed to be able to use image function?
GD library is needed to execute image functions.
How can PHP and Javascript interact?
PHP and Javascript cannot directly interact since PHP is a server side language and Javascript is a client-side language. However, we can exchange variables since PHP can generate Javascript code…
What type of operation is needed when passing values through a form or an URL?
If we would like to pass values through a form or an URL, then we need to encode and to decode them using htmlspecialchars() and urlencode().
How can PHP and HTML interact?
It is possible to generate HTML through PHP scripts, and it is possible to pass pieces of information from HTML to PHP.
How is the comparison of objects done in PHP?
We use the operator ‘==’ to test is two objects are instanced from the same class and have same attributes and equal values. We can test if two objects are…
What is the meaning of a final class and a final method?
‘final’ is introduced in PHP5. Final class means that this class cannot be extended and a final method cannot be overridden.
Is multiple inheritance supported in PHP?
PHP supports only single inheritance; it means that a class can be extended from only one single class using the keyword ‘extended’.
What is the main difference between PHP 4 and PHP 5?
PHP 5 presents many additional OOP (Object Oriented Programming) features.
How can we display the output directly to the browser?
To be able to display the output directly to the browser, we have to use the special tags <?= and ?>