<?php if(isset($_POST['submit'])){ $number= $_POST['number']; $a=0; $b=1; for($i=1;$i<=$number;$i++){ echo $a.", "; $c=$a; $a=$a+$b; $b=$c; } } ?> <html> <head> <title>Fibonacci Series</title> </head> <body> <form action="" method='POST'> <label for="number">Please Enter Length of series</label> <input type="text" name="number" value=""> <br><br> <input type="submit" value="Done" name="submit"> </form> </body> </html>
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