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Tutorial Php Interview Questions & Answers

Discussion in 'PHP Programming' started by manish kumar, Feb 19, 2019.

  1. manish kumar

    manish kumar New Member

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    1) 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'.

    2) 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.

    3) 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 referring to the same instance of the same class by the use of the identity operator '==='.

    4) 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.

    5) 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().

    6) 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 to be executed by the browser and it is possible to pass specific variables back to PHP via the URL.

    7) What is needed to be able to use image function?

    GD library is needed to execute image functions.

    8) What is the use of the function'imagetypes()'?

    imagetypes() gives the image format and types supported by the current version of GD-PHP.

    9) What are the functions to be used to get the image's properties (size, width, and height)?

    The functions are getimagesize() for size, imagesx() for width and imagesy() for height

    10) What should we do to be able to export data into an Excel file?


    The most common and used way is to get data into a format supported by Excel. For example, it is possible to write a .csv file, to choose for example comma as a separator between fields and then to open the file with Excel.
     

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    #1 manish kumar, Feb 19, 2019 at 5:01 AM
    Last edited: Feb 19, 2019

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