PHP array pointer craziness
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by JMan
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Published on 2010-05-29T04:58:53Z
Indexed on
2010/05/29
5:02 UTC
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php
I'm trying to create a "GetCurrentLevel" method that takes a point value as an input and returns what "Level" that corresponds to. I'm storing the Level => Points mapping in an array, but the array pointer is not moving logically when I use it a foreach loop. I've added echo statements for debugging. Here's my class definition:
class Levels extends Model
{
protected $_map = array (
'None' => 0,
'Bronze' => 50,
'Silver' => 200,
'Gold' => 500
);
public function __construct()
{
parent::__construct();
}
public function GetCurrentLevel($points)
{
foreach ($this->_map as $name => $threshold)
{
echo "Level Name: $name<br/>";
echo "Level Threshold: $threshold<br/>";
echo "Current Level: " . key($this->_map) . "<br/>";
echo "Current Threshold: " . current($this->_map) . "<br/>";
if ($points < $threshold) /* Threshold is now above the points, so need to go back one level */
{
$previousThreshold = prev($this->_map);
echo "Previous Threshold: $previousThreshold<br/>";
echo "Final Level: " . key($this->_map) . "<br/>";
return key($this->_map);
}
echo "Go to next level <br/>";
}
}
And here is what I see when I call GetCurrentLevel(60):
Level Name: None
Level Threshold: 0
Current Level: Bronze //* Looks like foreach immediately moves the array pointer *//
Current Threshold: 50
Go to next level
Level Name: Bronze
Level Threshold: 50
Current Level: Bronze //* WTF? Why hasn't the array pointer moved? *//
Current Threshold: 50
Go to next level
Level Name: Silver
Level Threshold: 200
Current Level: Bronze //* WTF? Why hasn't the array pointer moved? *//
Current Threshold: 50
Previous Threshold: 0
Final Level: None
But the "Final Level" should be 'Bronze' since 60 points is above the 50 points needed for a Bronze medal, but below the 200 points needed for a Silver medal.
Sorry for the long post. Thanks for your help!
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