Hướng dẫn php calculator w3schools
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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> |
