Comment pointer sur la bonne touche pour obtenir une valeur de tableau?

Question

J'ai les données de tableau comme indiqué ci-dessous, Je veux stocker la valeur 'vente' dans la base de données si ma devise est USD.

 
Array ([currency] => USD [sale] => 9120.00 [buy] => 8970.00 ) 
Array ([currency] => SGD [sale] => 6653.75 [buy] => 6520.75 ) 
Array ([currency] => HKD [sale] => 1173.40 [buy] => 1152.10 ) 
Array ([currency] => CHF [sale] => 8685.40 [buy] => 8517.40 ) 
Array ([currency] => GBP [sale] => 13958.80 [buy] => 13675.80 ) 
Array ([currency] => AUD [sale] => 8054.05 [buy] => 7885.05 ) 
Array ([currency] => JPY [sale] => 105.10 [buy] => 102.40 ) 
Array ([currency] => SEK [sale] => 1247.90 [buy] => 1216.80 ) 
Array ([currency] => DKK [sale] => 1590.95 [buy] => 1547.75 ) 
Array ([currency] => CAD [sale] => 8756.35 [buy] => 8568.35 ) 
Array ([currency] => EUR [sale] => 11776.75 [buy] => 11555.75 ) 
Array ([currency] => SAR [sale] => 2441.35 [buy] => 2382.35 ) 
Array ([currency] => NZD [sale] => 6550.75 [buy] => 6389.75 ) 
Array ([currency] => CNY [sale] => 1346.75 [buy] => 1322.35 ) 

Merci.

Voici mon code:

foreach ($cur_array as $curs) { 
    print_r ($curs)."<br>"; 
    if ($curs['currency'] = "USD") { 
     $curs_sale = $curs['sale']; 
      $curs_name = $curs['currency']; 
      $db->query("UPDATE currency SET rate = '". 
       $curs_sale."' WHERE currency_id ='".$curs_name."'"); 
    } 
} 

Answer 1

Vous pouvez simplement stocker tous les tableaux de monnaie dans un tableau, boucle à travers elle, vérifier laquelle des devises correspond à l'USD et enregistrer la valeur de vente de cette devise:

foreach ($currencies as $curr) 
{ 
    if ($curr['currency'] == 'USD') 
    { 
     // Save $curr['sale'] into your database 

     // Break as further iteration isn't needed 
     break; 
    } 
} 

In futu re, s'il vous plaît ne pas marquer des questions comme wiki de la communauté si vous ne connaissez pas what community wiki means.

Answer 2

Si l'on suppose toutes les entrées sont dans un tableau appelé entrées $:

foreach ($entries as $entry) { 
    if ($entry['currency'] == 'USD') { 
     // do stuff with $entry['sale'] 
    } 
} 

Answer 3

Ce que BoltClock a proposé est correct. En outre, envisager de modifier la structure de votre tableau à partir:

 
Array ([currency] => USD [sale] => 9120.00 [buy] => 8970.00 ) 
Array ([currency] => SGD [sale] => 6653.75 [buy] => 6520.75 ) 
Array ([currency] => HKD [sale] => 1173.40 [buy] => 1152.10 ) 
Array ([currency] => CHF [sale] => 8685.40 [buy] => 8517.40 ) 

à:

 
Array (
    [USD] => Array([sale] => 9120.00 [buy] => 8970.00), 
    [SGD] => Array([sale] => 6653.75 [buy] => 6520.75), 
    [HKD] => Array([sale] => 1173.40 [buy] => 1152.10), 
    [CHF] => Array([sale] => 8685.40 [buy] => 8517.40) 
) 

Cette structure vous permettra d'écrire un code plus propre, par exemple:

$usd_sale = $entries['USD']['sale'];