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I don't understand why your original code snippet isn't working. Could it be the fact that $cal_id[3] is not an array?

Ans= 2.5;
How and why?

Explain type of inheritance that php supports. -

Ans. PHP supports single inheritance. Using the extend keyword A class can inherit methods and members of another base class (only one).

How can Add element in end of the Array



add element to the end of the array

Access control modifiers:

There are a number of special keywords you can place before a class, a class function definition, or a class variable to alter the way PHP works with it - here's the full list, along with what each of them does:

Public: This variable or function can be used from anywhere in the script

Private: This variable or function can only be used by the object it is part of; it cannot be accessed elsewhere

Protected: This variable or function can only be used by the object it is part of, or descendents of that class

Final: This variable or function cannot be overridden in inherited classes

Abstract: This function or class cannot be used directly - you must inherit from them first

The Perl Programming Language

The Perl Programming Language - www.perl.org 25,000 extensions on CPAN That's why we love Perl 5 Download Perl Get started Perl 5 is a highly capable, feature-rich programming language with over 26 years of development.

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Core Java Tutorial | Learn By Example Core Java | Cheat Sheet for Core Java

Core Java Tutorial | Learn By Example Core Java | Cheat Sheet for Core Java This Java tutorial is basically for Beginners who wants to learn java from basics. Here you learn everything from installing JDK to Variable to operator to Access modifier.