In this tutorial, we will learn about the following;
- Prime Number Program in PHP
- Prime Number Program in PHP with Form
- Prime Number Program in PHP with Database
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<html> <body> <center> <h2>Program 1</h2> <p>Prime number program in PHP </p> <?php $num=29; $LeastPrime=2; if($num<2) { echo"$num is less than 2 Smallest prime number is 2"; } for($LeastPrime=2;$LeastPrime<$num;$LeastPrime++) { if($num%$LeastPrime==0) { echo"$num is not a prime number"; break; } } if($num==$LeastPrime) { echo"$num is a Prime number"; } ?> </center> </body> </html> |
In this example, we will take the inputs from the user and store them in variables.
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<html> <body> <center> <h2>Program 2</h2> <p> Prime number program in PHP (Using Form) </p> <h2> <form method="post"> <label>Enter any number</label><br /> <input type="text" name="number" /><br /> <input type="submit" name="submit" /> <br /><br /> </form></h2> <?php if(isset($_POST['submit'])){ $num=$_POST['number'];} $Counter=2; if($num<2) { echo"$num is less than 2 and Smallest prime number is 2"; } for($Counter=2;$Counter<$num;$Counter++) { if($num%$Counter==0) { echo"$num is not a prime number"; break; } } if($num==$Counter) { echo"$num is a Prime number"; } ?> </center> </body> </html> |
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<html> <body> <center> <h2>Program 3</h2> <p> Prime number program in PHP (Using Form and SQL) </p> <h2> <form method="post"> <label>Enter any number</label><br /> <input type="text" name="number" /><br /> <input type="submit" name="submit" /> <br /><br /> </form></h2> <?php if(isset($_POST['submit'])){ $num=$_POST['number']; $Counter=2; if($num<2) { $result="$num is less than 2 and Smallest prime number is 2"; echo"$num is less than 2 and Smallest prime number is 2"; } for($Counter=2;$Counter<$num;$Counter++) { if($num%$Counter==0) { echo"$num is not a prime number"; $result="$num is not a prime number"; break; } } if($num==$Counter) { echo"$num is a Prime number"; $result="$num is a Prime number"; } $con=mysqli_connect("localhost","root","","test2"); $sql=mysqli_query($con,"INSERT INTO prime (Number,Result) VALUES ('$num','$result')"); } ?> </center> </body> </html> |
