PHP program to create a Simple Calculator: The below program is to create a Simple Calculator in PHP. <!DOCTYPE html> <html> <body> <?php ini_set('display_errors',0); if( isset( $_REQUEST['calculate'] )) { $operator=$_REQUEST['operator']; $n1 = $_REQUEST['first_value']; $n2 = $_REQUEST['second_value']; if($operator=="+") { $res= $n1+$n2; } if($operator=="-") { $res= $n1-$n2; } if($operator=="*") { $res =$n1*$n2; } if($operator=="/") { $res= $n1/$n2; } if($_REQUEST['first_value']==NULL || $_REQUEST['second_value']==NULL) { echo "<script language=javascript> alert(\"Please Enter Correct values.\");</script>"; } } ?> <form> <table style="border:groove #00FF99"> <tr> <td style="background-color:turquoise; color:black; font-family:'Times New Roman'">Enter Number</td> <td colspan="1"> <input name="first_value" type="text" style="color:red"/></td> </tr> <tr> <td style="color:red; font-family:'Times New Roman'">Select Operator</td> <td> <select name="operator" style="width: 63px"> <option>+</option> <option>-</option> <option>*</option> <option>/</option> </select></td> </tr> <tr> <td style="background-color:turquoise; color:black; font-family:'Times New Roman'">Enter Number</td> <td class="auto-style5"> <input name="second_value" type="text" style="color:red"/></td> </tr> <tr> <td></td> <td><input type="submit" name="calculate" value="Calculate" style="color:wheat;background-color:rosybrown" /></td> </tr> <tr> <td style="background-color:turquoise;color:black">Output = </td> <td style="color:darkblue"><?php echo $res;?></td> </tr> </table> </form> </body> </html>  |
