[php] Pass a PHP variable value through an HTML form

In a html form I have a variable $var = "some value";.

I want to call this variable after the form posted. The form is posted on the same page.

I want to call here

if (isset($_POST['save_exit']))
{

    echo $var; 

}

But the variable is not printing. Where I have to use the code GLOBAL ??

Try that

First place

global $var;
$var = 'value';

Second place

global $var;
if (isset($_POST['save_exit']))
{
    echo $var; 
}

Or if you want to be more explicit you can use the globals array:

$GLOBALS['var'] = 'test';

// after that
echo $GLOBALS['var'];

And here is third options which has nothing to do with PHP global that is due to the lack of clarity and information in the question. So if you have form in HTML and you want to pass "variable"/value to another PHP script you have to do the following:

HTML form

<form action="script.php" method="post">
    <input type="text" value="<?php echo $var?>" name="var" />
    <input type="submit" value="Send" />
</form>

PHP script ("script.php")

<?php

$var = $_POST['var'];
echo $var;

?>