What is generator and how is it used in PHP?

What is a generator in PHP?

A generator is basically a normal function, but instead of returning a value it yields as many values as it needs to. It looks like a function but acts like an iterator. Generators use the yield keyword instead of return . … As you iterate over that object, PHP calls the generator each time it needs a value.

What is generator explain with example?

A generator is a special type of function which does not return a single value, instead, it returns an iterator object with a sequence of values. In a generator function, a yield statement is used rather than a return statement. … In the above example, the mygenerator() function is a generator function.

What is the use of generator function?

Generator functions provide a powerful alternative: they allow you to define an iterative algorithm by writing a single function whose execution is not continuous. Generator functions are written using the function* syntax. When called, generator functions do not initially execute their code.

When should you use a generator?

Generators are good for calculating large sets of results (in particular calculations involving loops themselves) where you don’t know if you are going to need all results, or where you don’t want to allocate the memory for all results at the same time.

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Is equal to in PHP?

PHP Comparison Operators

Operator Name Result
== Equal Returns true if $x is equal to $y
=== Identical Returns true if $x is equal to $y, and they are of the same type
!= Not equal Returns true if $x is not equal to $y
<> Not equal Returns true if $x is not equal to $y

What is PHP yield function?

In its simplest form, a yield statement looks much like a return statement, except that instead of stopping execution of the function and returning, yield instead provides a value to the code looping over the generator and pauses execution of the generator function.

What are the three program generator?

Some examples of program generators are Adventure Maker, Alice, and YoYo Games.

What are generators in coding?

In computer science, a generator is a routine that can be used to control the iteration behaviour of a loop. All generators are also iterators. A generator is very similar to a function that returns an array, in that a generator has parameters, can be called, and generates a sequence of values.

Which is the correct way to declare a generator function?

The function* declaration ( function keyword followed by an asterisk) defines a generator function, which returns a Generator object.

How does a signal generator work?

Signal generators are also often called signal sources or simply, sources. A signal generator allows you to output signals with various frequencies, amplitudes, and time durations. Many signal generators even allow you to modulate frequency, amplitude, and phase signals.

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