How can variables be passed from one PHP file to another using hidden fields in forms?

To pass variables from one PHP file to another using hidden fields in forms, you can set the value of the hidden field to the variable you want to pass and then submit the form to the target PHP file. In the target file, you can access the passed variable using the $_POST superglobal array. 

// Source PHP file
$variableToPass = "Hello, world!";
?>

<form action="target.php" method="post">
    <input type="hidden" name="passedVariable" value="<?php echo $variableToPass; ?>">
    <input type="submit" value="Submit">
</form>
```

```php
// Target PHP file (target.php)
$passedVariable = $_POST['passedVariable'];
echo $passedVariable; // Output: Hello, world!

Keywords

PHP hidden fields forms variable passing file communication

Related Questions