PHP program to swap the two numbers in PHP.
In this example, programmer stores the values in the variables. However, if you interested to see the program about taking values in the form, please see example 2.
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<?php $a = 10; $b = 20; echo "<br> The number before swapping is: <br>"; echo "<br>Number a =".$a." and b=".$b."<br>"; $c = $a; $a = $b; $b = $c; echo "<br>The number after swapping is: <br>"; echo "<br>Number a =".$a." and b=".$b."<br>"; ?> |
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<?php $n1=""; $n2=""; $n3=""; $r1=""; $r2=""; if(isset($_POST["S1"])) { $n1=$_POST["T1"]; $n2=$_POST["T2"]; $r1=$n2; $r2=$n1; } ?> <html> <body> <h2 align="center">Swap two numbers using a third variable</h2> <form method="post" name="Form1" > <table align="center" > <tr><td >Value of A</td> <td>= <input name="T1" size="15" type="text" value="<?php echo($n1);?>"></td> </tr> <tr> <td >Value of B</td><td>= <input name="T2" size="15" type ="text" value="<?php echo($n2);?>"> </td> </tr> <tr><td colspan="2"><p></p></td> </tr> <tr> <td colspan="2" align="center"> <input value="SWAP" type="submit" name="S1"> </td> </tr> <tr><td colspan="2"><p></p></td> </tr> <tr><td><h2 align="center">After Swaping</h2></td></tr> <tr> <td >Value of A</td> <td>= <input name="T4" size="15" readonly="" type="text" value="<?php echo($r1);?>"></td> </tr> <tr> <td >Value of B</td> <td>= <input name="T5" size="15" readonly="" type="text" value="<?php echo($r2);?>"></td> </tr> </table> </form> </body> </html> |
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<?php $n1=""; $n2=""; $n3=""; $r1=""; $r2=""; if(isset($_POST["S1"])) { $n1=$_POST["T1"]; $n2=$_POST["T2"]; $r1=$n2; $r2=$n1; $server="localhost"; $name="roor"; $password=""; $dbname="swap"; $con=mysqli_connect("localhost","root","","swap"); $sql=mysqli_query($con,"INSERT INTO u_table (first_no,second_no,swap_1,swap_2) VALUES ('$n1','$n2','$r1','$r2')"); echo"<h3>Values are Saved in database</h3>"; } ?> <html> <body> <h2 align="center">Swap two numbers using a third variable</h2> <form method="post" name="Form1" > <table align="center" > <tr><td >Value of A</td> <td>= <input name="T1" size="15" type="text" value="<?php echo($n1);?>"></td> </tr> <tr> <td >Value of B</td><td>= <input name="T2" size="15" type ="text" value="<?php echo($n2);?>"> </td> </tr> <tr><td colspan="2"><p></p></td> </tr> <tr> <td colspan="2" align="center"> <input value="SWAP" type="submit" name="S1"> </td> </tr> <tr><td colspan="2"><p></p></td> </tr> <tr><td><h2 align="center">After Swaping</h2></td></tr> <tr> <td >Value of A</td> <td>= <input name="T4" size="15" readonly="" type="text" value="<?php echo($r1);?>"></td> </tr> <tr> <td >Value of B</td> <td>= <input name="T5" size="15" readonly="" type="text" value="<?php echo($r2);?>"></td> </tr> </table> </form> </body> </html> |
