PHP Course For Beginners > Functions in PHP

Call by value vs Call by reference in PHP

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Overview
In this tutorial learn, how to use PHP's Call by Value and Call by Reference features to build powerful PHP scripts. I'll also show you how to use PHP's built-in reference function, so you can get a good idea of what your code is doing without having to understand it.Learn how to use the php call by value and call by reference functions to create custom function calls & complex expressions in your php program.
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A copy of the variable is passed in Call by value, whereas a variable is passed in Call by reference. In programming languages such as C++, PHP, Visual Basic NET, and C#, call by value is the default way, but call by reference is only supported in Java.

Make a value-based call. Call based on a referral. Variable values are passed to a function when it is called. "Call By Values" functions are what they're called. Instead of giving the values of variables to a function, we pass the address of variables (location of variables) to the "Call By References" function.

The address of a variable is passed in a call by reference. The address of a variable's value is the location where it is kept. In this example, we use PHP's call by reference to swap two numbers. The values $a = 5 and $b = 7 were supplied to the swap() method in the preceding example.

TL;DR: Both pass by value and pass by reference are supported in PHP. The ampersand (&) is used to declare references, which is similar to how C++ implements it. When a function's formal parameter isn't stated with an ampersand (i.e., it's not a reference), everything, including objects, is supplied by value.

The address of the actual arguments is copied to the formal parameters when invoking a function with Call By Address. Call by reference, on the other hand, is a method of delivering arguments to a function by copying an argument's reference into the formal parameter.

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Anish Narang
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Best Course in Market till now

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Nitish Kumar Sharma
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Meet Shah is the worst teacher i have found in learnvern platform please replace his video with some other teacher he is unable to explain concept properly and sometimes he explain concept incorrect.

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Sonu sonu
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very good

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Islam Web
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Nice

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Ravi Ranjan Tiwari
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I am very happy that I am studying from LearnVern.

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Muhammad Talha
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help full.

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Prince Bavishi
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nice work

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sonakshi Raj
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Excellent

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Shibu Kumari
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Very Good

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Rajiv Kumar Singh
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It would have been better if you could have provided the resource/source_code files of the CRUD operations so that we could have cross verified our code with yours.

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Course Content

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  2. Understanding SDLC Process
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  3. How to use LearnVern
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  4. Client Server Architecture
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  5. How to set up PHP Environment?
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  1. What is Data
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  2. What is Database
    3m 25s
  3. What is DBMS
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  4. SQL Queries and its types
    16m 57s
  5. Data Types in SQL - from 16
    22m 41s
  6. SQL constraints
    10m 52s
  7. Create, Drop & Show Database
    13m 40s
  8. SQL Create Table
    13m 53s
  9. SQL Insert & Select Statement
    26m 56s
  10. Operators in SQL
    6m 47s
  11. In & NOt in Condition
    7m 4s
  12. Null & Not Null Condition
    4m 55s
  13. Clauses in SQL
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  14. Understanding Having, Distinct & Group by
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  15. Update & Delete in SQL
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  16. Alter table command in SQL
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  17. MySQL Rename truncate Drop
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  18. Understanding Foreign key
    15m 37s
  19. MySQL joins
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  20. MySQL views
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  21. MySQL Function
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  22. MySQL Procedure
    15m 33s
  23. MySQL Trigger
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  24. Normalization
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  25. Assignment : MYSQL
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  1. Understanding HTTP Methods
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  1. Understanding PHP Program structure Comments in PHP
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  1. Variables in PHP
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  1. Arithmetic & Assignment Operators in PHP
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  2. Comparison & Logical Operators in PHP
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  3. Ternary Operator in PHP
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  4. Assignment : Operators
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  1. Super Global Variable in PHP
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  2. GET & POST Variable in PHP
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  3. $_FILES & $_ENV in PHP
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  4. Assignment : Super Global Variables
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  1. If-else in PHP
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  2. switch case in PHP
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  3. Assignment : Conditional Statements
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  1. Functions in PHP
    39m 46s
  2. Call by value vs Call by reference in PHP
    17m 28s
  3. Assignment : Functions
    5m 25s

  1. Array Functions in PHP
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  2. Array in PHP
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  3. Assignment : Array
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  1. String and its Functions in PHP
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  2. Assignment : String
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  1. Loops in PHP
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  2. More examples on Loops in PHP
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  3. Assignment : Loops
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  1. Cookies in PHP
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  2. Session in PHP
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  1. Header Function in PHP
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  2. Assignment : Header Functions
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  1. Date and Time functions in PHP
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  2. Assignment : Date Time Functions
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  1. Include & Require Statement in PHP
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  1. Error Handling in PHP
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  1. File Upload in PHP
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  1. Database Connection in PHP Part 1
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  2. Database Connection in PHP Part 2
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  1. SQL Injection in PHP
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  1. Crud - Registration and DB connection Part 1
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  2. Crud - Registration and DB connection Part 2
    24m 2s
  3. Log in Operation
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  4. Read Operation
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  5. Update Operation Part 1
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  6. Update Operation Part 2
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  7. Log out Operation
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  1. MySQL Interview Question 1
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  2. MySQL Interview Question 2
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  3. MySQL Interview Question 3
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