Detailed explanation of php small functions_PHP tutorial

$dy=$_POST["dy"];
$de=$_POST["de"];
$jsf=$_POST["select"];
$qingkong=$_POST["qingkong"];
$Submit=$_POST["Submit"];

if($jsf=="jia"){
$zhi=$dy+$de;
$zhi="Your calculation result is:$zhi";
}
if($jsf=="jian"){
$zhi=$dy-$de;
$zhi="Your calculation result is:$zhi";
}
if($jsf=="chen"){
$zhi=$dy*$de;
$zhi="Your calculation result is:$zhi";
}
if($jsf=="chu"){
if($de=="0"){
$zhi="The dividend cannot be 0, please re-enter a valid number!";
}else{
$zhi=$dy/$de;
$zhi="Your calculation result is:$zhi";
}
}
if($jsf=="yu"){
if($de=="0"){
$zhi="The remainder cannot be 0";
}else{
$zhi=$dy%$de;
}
}

if($qingkong=="clear"){
unset($dy,$de,$zhi);
}

?>

Simple Calculator

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http://www.bkjia.com/PHPjc/478269.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/478269.htmlTechArticle?php $dy=$_POST[dy]; $de=$_POST[de]; $jsf=$ _POST[select]; $qingkong=$_POST[qingkong]; $Submit=$_POST[Submit]; if($jsf==jia){ $zhi=$dy+$de; $zhi=Your calculation result is:$ zhi; } if($js...