我有以下數組,我想要計算「PaymentType」==貝寶的元素。我正在使用此方法 $ totalcount = count(array_filter((array) $data[0], 'paypal'));
但收到警告「'paypal',應該是有效的回調」 感謝任何迴應,幫助我朝着正確的方向前進。PHP多維陣列計數
Array
(
[0] => Array
(
[TransactionDate] => 0000-00-00 00:00:00
[TotalAmount] => 0.00
[PayPalFee] => 2.48
[PayPalTransactionID] => 92
[PaymentType] => paypal
)
[1] => Array
(
[TransactionDate] => 0000-00-00 00:00:00
[TotalAmount] => 0.00
[PayPalFee] => 2.48
[PayPalTransactionID] => 3
[PaymentType] => paypal
)
[2] => Array
(
[TransactionDate] => 2011-05-16 11:15:02
[TotalAmount] => 75.00
[PayPalFee] => 2.48
[PayPalTransactionID] => 2
[PaymentType] => paypal
)
)
'array_filter'需要** **回調作爲第二個參數,如文檔中描述:http://php.net/manual/en/function。陣列filter.php。在那裏你還會找到關於如何使用'array_filter'的例子。 – 2012-01-03 14:44:19