比較數組值來計算PHP中的％？

Question

所以我們的目標是能夠根據數據庫中的動態變量爲我的進度條創建一個動態值。下面是我所期待的，如果可能的僞代碼：

//League rank names 
['bronze_V','bronze_IV','bronze_III','bronze_II','bronze_I']; 

Lets say i start at bronze_IV to bronze_II i need to calculate that to 100? 
and then i need to store that value is that possible to be dynamic? 

Answer 1

你想這樣的事情，

$data = ['bronze_V','bronze_IV','bronze_III','bronze_II','bronze_I']; 

$start = $end = 0; 

while($element = current($data)) { 
    if ($element == 'bronze_IV') $start = key($data); 
    if ($element == 'bronze_I') $end = key($data); 
    next($data); 
} 

$percentage = ((($end-$start) + 1)/count($data)) * 100; 

var_dump($percentage); //float(80) 

例如多層次，

#note : badge count for each tier has to be 5 for this to work, 
#if you change the count change change the value inside the loop 

$data = array(
     ['silver_V','silver_IV','silver_III','silver_II','silver_I'], 
     ['bronze_V','bronze_IV','bronze_III','bronze_II','bronze_I'] 
    ); 

$start = $end = 0; 

$start_badge = 'silver_V'; 
$end_badge = 'bronze_II'; 

//loop through tiers 
foreach ($data as $key => $tier) { 
    //loop through badges 
    while($badge = current($tier)){ 
     //position of the start badge 
     if ($badge == $start_badge) $start = ($key * 5) + key($tier)+1; //see note 
     //position of the end badge 
     if ($badge == $end_badge) $end = ($key * 5) + key($tier)+1; //see note 
     next($tier); 
    } 
} 

//count badges 
$badges_count = (count($data, COUNT_RECURSIVE) - count($data)); 

//calculate percentage 
$percentage = ((($end-$start) + 1)/$badges_count) * 100; 

var_dump($percentage); //float(90)