Question

I keep getting undefiendd variable for steps in Text5.php when accessing Text2.php. My question is how come I amgetting an undefined variable as I have included the variable $steps as an array:

Text5.php

    <?php

$steps = array(1 =>'Text1.php',2 => 'Text2.php',3 => 'Text3.php',4 => 'Text4.php',5 => 'Text6.php',6 => 'Text7.php');

function allowed_in($steps){
// Track $latestStep in either a session variable
// $currentStep will be dependent upon the page you're on

if(isset($_SESSION['latestStep'])){
   $latestStep = $_SESSION['latestStep'];
}
else{
   $latestStep = 0;
}
$currentStep = basename(__FILE__); 

$currentIdx = array_search($currentStep, $steps);
$latestIdx = array_search($latestStep, $steps);

if ($currentIdx - $latestIdx == 1 )
    {
       $currentIdx = $_SESSION['latestStep'];
       return 'Allowed';
    }
    return $latestIdx;
}

?>

Text2.php

            if (allowed_in()=== "Allowed")
    {
        //Text2.php code
    }
    else
        {
$page = allowed_in()+1;
?>

<div class="boxed">
<a href="<?php echo $steps[$page] ?>">Link to Another Page</a>
</div>

<?php   

}

?>

Answer 1

My question is how come I amgetting an undefined variable as I have included the variable $steps as an array

You never actually called allowed_in with any array.

Both if (allowed_in()=== "Allowed") and $page = allowed_in()+1; calls the allowed_in() function without any parameters, and in your function:

function allowed_in($steps){ you specify that there MUST be a variable (that we create name $steps).

You can create default parameters by using the = sign:

function allowed_in($steps = array()){
    //Logic
}

Which means you can now call it with no parameters.

You might also be looking for global in case it’s because your $steps variable is in the global scope:

function allowed_in(){
    global $steps;
    //Logic
}