Here in this post, you will be learning about the reference role in the PHP assignment. Students who want PHP assignment help online can consult BookMyEssay.

Variables: The reference assignments in the PHP comprises variables and these variables are the reference of the another variable. Suppose, you have two variables.

The resultant would be the ‘red’ and ‘blue’. Now, change the $b to the reference of $a.

In this the second resultant would be ‘red’ and ‘red’. And the ampersand (&) stands for the 2^nd assignment of the $b. It means the value of the $b is turns to value of $a.

Remove the reference assignment: for removing the reference assignment, one need to unset() function for it.  For example, you can remove the $b as mentioned in the above example.

The result would be the value of the ‘red’ as the value of $b no longer serve its purpose. One need to enable the error warning for getting notification for the $b variables.

Reference in the functions argument:   one can utilize a reference for a variable for the argument of the function, suppose a numeric style function for forming a reference.

The value remains 5 as the $red_ball is a global variable. Lets’ continue with the argument as a reference.

Now, the resultant would be 15, as the argument continues with a preceding ampersand. it is a reference for the argument such as, $ red_ball that has a global value of 5 and later becomes 15.

Utilize reference in a functions return value:  One can also use it for the  functions return value.

Function  & color_return()  {

global  $a;

$a =  $a  *  2;

return  $a ;

}

$a  =  15;

$b  = & color_return();

In result, the above mentioned ampersand is utilized for the naming the function and whenever the variable is assigned as a reference to the function, the ampersand contributes its role.

 The resultant of the $a and the $b is 15.

In case, the $b value is assigned to another value.

$b  =  ‘potato  head’ ;

echo “{$a}{$b}”;

the echo is a and b, they result would be the potato head as $b is now referred as a return value.

Utilizing a reference in an instance of a class:  In OOP and PHP, you can make a reference for the instance by using the $this.

Class MyExample {

Function method_ inside_example()   {

Echo ‘Method from inside example I am called  ‘   .  get_class($this)

}

Function hello()   {

$this->method_inside_example();

}

}

$blackboard = new MyExample();

$blackboard->method_inside_example();

$blackboard->hello();

So, the reference is made of the class $blackboard and it is also known as 2 methods. The first resultant would be the class name.

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