Hesap Makinesi Uygulaması
<?php
if(!$_POST['act'])
{
echo '
<form method="post" action="'.$_SERVER['PHP_SELF'].'">
<input type="text" name="z1" size="5">
<select name="act">
<option value="add">[ + ]</option>
<option value="sub">[ - ]</option>
<option value="div">[ / ]</option>
<option value="mul">[ * ]</option>
<option value="pro">[ % ]</option>
</select>
<input type="text" name="z2" size="5">
<input type="submit" name="doit" value="calculate">
</form>
';
}else{
if($_POST['act'] == 'add')
{
$calc = ($_POST['z1']+$_POST['z2']);
$op = '+';
}
if($_POST['act'] == 'sub')
{
$calc = ($_POST['z1']-$_POST['z2']);
$op = '-';
}
if($_POST['act'] == 'div')
{
$calc = ($_POST['z1']/$_POST['z2']);
$op = '/';
}
if($_POST['act'] == 'mul')
{
$calc = ($_POST['z1']*$_POST['z2']);
$op = '*';
}
if($_POST['act'] == 'pro')
{
$calc = (($_POST['z2']*$_POST['z1'])/100);
$op = '% of';
}
echo $_POST['z1'].' '.$op.' '.$_POST['z2'].' = '.$calc;
}
?>

if(!$_POST['act'])
{
echo '
<form method="post" action="'.$_SERVER['PHP_SELF'].'">

<input type="text" name="z1" size="5">
<select name="act">
<option value="add">[ + ]</option>
<option value="sub">[ - ]</option>
<option value="div">[ / ]</option>
<option value="mul">[ * ]</option>
<option value="pro">[ % ]</option>
</select>
<input type="text" name="z2" size="5">
<input type="submit" name="doit" value="calculate">
</form>
';
}else{
if($_POST['act'] == 'add')
{
$calc = ($_POST['z1']+$_POST['z2']);
$op = '+';
}
if($_POST['act'] == 'sub')
{
$calc = ($_POST['z1']-$_POST['z2']);
$op = '-';
}
if($_POST['act'] == 'div')
{
$calc = ($_POST['z1']/$_POST['z2']);
$op = '/';
}
if($_POST['act'] == 'mul')
{
$calc = ($_POST['z1']*$_POST['z2']);
$op = '*';
}
if($_POST['act'] == 'pro')
{
$calc = (($_POST['z2']*$_POST['z1'])/100);
$op = '% of';
}
echo $_POST['z1'].' '.$op.' '.$_POST['z2'].' = '.$calc;
}
?>
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