Write a program for fibonacci series using recursion in php.

Question

Amrita Bhattacharjee · Answer

The following program in PHP using recursion can be used for fibonacci series using -
andlt;?phpand and 
$numand =and 0;and and 
$n1and =and 0;and and 
$n2and =and 1;and and 
echoand 'andlt;h3>Fibonacciand seriesand forand firstand 12and numbers:and andlt;/h3>';and and 
echoand '
';and and 
echoand $n1.'and '.$n2.'and ';and and 
whileand ($numand andlt;and 10and )and and 
{and and 
and and $n3and =and $n2and and#43;and $n1;and and 
and  echoand $n3.'and ';and and 
and  $n1and =and $n2;and and 
and $n2and =and $n3;and 
and and and  $numand =and $numand and#43;and 1;and and 
and  and ?>and and

palak sharma · Answer

Here is an example of a program that uses recursion to generate the Fibonacci series in PHP:
Copy code
andlt;?php 
// Function to generate Fibonacci series 
function fibonacci($n) { and  and 
if ($n andlt;= 0) { and  and 
and  and  return 0; and  and 
} else if ($n == 1) { and and 
and  and  and return 1; and 
and  } else { and  and and 
and  and return fibonacci($n-1) and#43; fibonacci($n-2); and  and 
} 
} 
// Test the function $n = 10;
for ($i = 0; $i andlt; $n; $iand#43;and#43;) {
and  and echo fibonacci($i) . ' '; 
} 
?> 
The function fibonacci() uses recursion to calculate the Fibonacci series. The base case of the recursion is when the input $n is 0 or 1, in which case the function returns 0 or 1 respectively. For any other value of $n, the function calls itself twice, with the input decremented by 1 and 2, respectively. The value returned by the function is the sum of the two recursive calls.
In this program, the function is called in a for loop, where the input $i varies from 0 to $n-1. This will generate and print the first $n numbers of Fibonacci series.
You can also create a function that returns an array with the Fibonacci series or you can modify the above program to print the fibonacci series up to a certain number, not a quantity of numbers.

Kirti Sharma · Answer

The program to generate the fibonacci series is as follows:
andlt;?phpand and 
/* Print fiboancci series upto 12 elements. */and and 
$num = 12;and and 
echo 'andlt;h3>Fibonacci series using recursive function:andlt;/h3>';and and 
echo '
';and and 
/* Recursive function for fibonacci series. */and and 
function series($num){and and 
and  and  if($num == 0){and and 
and  and  return 0;and and 
and  and  }else if( $num == 1){and and 
return 1;and and 
} else {and and 
return (series($num-1) and#43; series($num-2));and and 
}and  and 
}and and 
/* Call Function. */and and 
for ($i = 0; $i andlt; $num; $iand#43;and#43;){and and 
echo series($i);and and 
echo '
';and and 
}and and

Siddhi Malviya · Answer

andlt;?phpand and 
/* Print fiboancci series upto 12 elements. */and and 
$num = 12;and and 
echo 'andlt;h3>Fibonacci series using recursive function:andlt;/h3>';and and 
echo '
';and and 
/* Recursive function for fibonacci series. */and and 
function series($num){and and 
and  and  if($num == 0){and and 
and  and  return 0;and and 
and  and  }else if( $num == 1){and and 
return 1;and and 
} else {and and 
return (series($num-1) and#43; series($num-2));and and 
}and  and 
}and and 
/* Call Function. */and and 
for ($i = 0; $i andlt; $num; $iand#43;and#43;){and and 
echo series($i);and and 
echo '
';and and 
}and and

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Write a program for fibonacci series using recursion in php.

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