Array index is variable

programming
1

For some reason my code won’t recognize the index that is getting passed over a URL.

On page 1 the code says


<?php
    
    $xml = simplexml_load_file('events.xml');
    
    $day=array(0 => 0, 1 => 1, 2 => 2, 3 => 3, 4 => 4, 5 => 5, 6 => 6, 7 => 7);
    

?>

Then when you click the link to the new page the url is “events.html?day=0”

On the second page the code is


<?php

    $xml = simplexml_load_file('events.xml');
    
    $day=array(0 => 0, 1 => 1, 2 => 2, 3 => 3, 4 => 4, 5 => 5, 6 => 6, 7 => 7);
    
    $dayvalue=$_GET['day'];
    
    $event = $xml->event[$dayvalue];
    
    echo $dayvalue. '<br />';
    
    $name = $event->name;
    $location = $event->location;
    $time = $event->time;
    
    echo 'Name: ' .$name. '<br />';
    echo 'Location: ' .$location. '<br />';
    echo 'Time: ' .$time. '<br />';
    
?>

The problem comes at $event = $xml->event[$dayvalue];

If I replace $dayvalue with 0 it works. I have echo $dayvalue and it outputs 0.

Why won’t this work?