A simple program to demonstrate increment and decrement using PHP programming language.
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Program Listing
<?php
$sum=0;
if(isset($_POST['minus'])){
$sum=$_POST['sum'];
$sum--;
}
if(isset($_POST['add'])){
$sum=$_POST['sum'];
$sum++;
}
?>
<!doctype html>
<html>
<head>
<title>Increment and Decrement in PHP</title>
</head>
<body>
<form method="POST" action="">
<h2>Increment and Decrement in PHP</h2>
<input type="submit" name="minus" value="--"/>
<input type="text" name="sum" value="<?=$sum;?>" size="1"/>
<input type="submit" name="add" value="++"/>
</form>
</body>
</html>
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