php - 数値範囲での通貨の正規表現一致

Question

私はこの正規表現を使用しています：

^\$?([0-9]{1,3},([0-9]{3},)*[0-9]{3}|[0-9]+)(.[0-9][0-9])?$

カンマありまたはなしのドル通貨金額のこの正規表現一致

1000 から 2000 までの数値を通貨形式で照合したい。

例：

マッチ$1,500.00 $2000.0 $1100.20 $1000

一致しない$1,000.0000 $3,000 $2000.1 $4,000 $2500.50

Answer 1

[$]\([1][[:digit:]]\{3\}\|2000\)\(,[[:digit:]]+\|\)

この式はこの言語を定義します:

• ドルの後に 1 xyz または 2000 が続きます。

• 最後に、必要に応じてコンマと 1 つ以上の数字が続きます

Answer 2

どうですか：

/^\$(?:1,?\d{3}(?:\.\d\d?)?|2000(?:\.00?)?)$/

説明：

 ^                        the beginning of the string
----------------------------------------------------------------------
  \$                       '$'
----------------------------------------------------------------------
  (?:                      group, but do not capture:
----------------------------------------------------------------------
    1                        '1'
----------------------------------------------------------------------
    ,?                       ',' (optional (matching the most amount
                             possible))
----------------------------------------------------------------------
    \d{3}                    digits (0-9) (3 times)
----------------------------------------------------------------------
    (?:                      group, but do not capture (optional
                             (matching the most amount possible)):
----------------------------------------------------------------------
      \.                       '.'
----------------------------------------------------------------------
      \d                       digits (0-9)
----------------------------------------------------------------------
      \d?                      digits (0-9) (optional (matching the
                               most amount possible))
----------------------------------------------------------------------
    )?                       end of grouping
----------------------------------------------------------------------
   |                        OR
----------------------------------------------------------------------
    2000                     '2000'
----------------------------------------------------------------------
    (?:                      group, but do not capture (optional
                             (matching the most amount possible)):
----------------------------------------------------------------------
      \.                       '.'
----------------------------------------------------------------------
      0                        '0'
----------------------------------------------------------------------
      0?                       '0' (optional (matching the most
                               amount possible))
----------------------------------------------------------------------
    )?                       end of grouping
----------------------------------------------------------------------
  )                        end of grouping
----------------------------------------------------------------------
  $                        before an optional \n, and the end of the
                           string
----------------------------------------------------------------------
)                        end of grouping