如何计算定位标记的点击次数？

Question

I have a anchor tag:

<a href="abc.php?a=1">Count Click</a>

I want to count number of times this link has been clicked.

In abc.php I use the following code but it is not working:

$b = $_GET['a'];
$b += 1;
echo "Number of Times Clicked=".$b;

Answer 1

EDIT Use a POST instead;

$a = intval($_POST['a']);

session_start();
$b = intval($_SESSION['clickCount']);
$b += $a;
$_SESSION['clickCount'] = $b;
session_write_close();

Answer 2

You should store the value of this variable somewhere, because when you send GET request the page is refreshing and your value is missing.

You can store this value in session. See http://php.net/manual/features.sessions.php or cookies see http://php.net/manual/features.cookies.php or in some database on server.

And then get it from there.

Answer 3

First of all recommend you to store values in $_SESSION and also use $_POST

Why use $_SESSION & $_POST ? because no one can mess up with your application.

Basic Example (PHP):

<?php
session_start();
$varCount = 0;
if(isset($_POST['submit'])){
    $var = intval($_POST['var']);
    $addVar = $var+1;
    $_SESSION['newVar'] = $addVar;
}
else{
    unset($_SESSION['newVar']);
}
if(isset($_SESSION['newVar'])){
    $varCount = intval($_SESSION['newVar']);
    echo $varCount;
}
?>

HTML:

<form method="post" action="">
    <input type="hidden" name="var" value="<?=$varCount?>">
    <input type="submit" name="submit" value="Add">
</form>