Hướng dẫn php calculator function
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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 "
"; } } ?> <form> <table style="border:groove #00FF99"> <tr> <td style="background-color:turquoise; color:black; font-family:'Times New Roman'">Enter Numbertd> <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 Operatortd> <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 Numbertd> <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>
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