文字列 (例: 1,120.01) から 10 進数 (ドットとコンマ) を含む数値を抽出する方法 私は正規表現を持っていますが、コンマではうまくいかないようです
preg_match('/([0-9]+\.[0-9]+)/', $s, $matches);
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6 に答える
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コンマと小数を使用して数値を一致させるための正しい正規表現は次のとおりです (最初の 2 つは、数値が正しくフォーマットされていることを検証します)。
decimal オプション (小数点以下 2 桁)
^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*(?:\.[0-9]{2})?$
説明:
number (decimal optional)
^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*(?:\.[0-9]{2})?$
Options: case insensitive
Assert position at the beginning of the string «^»
Match a single character present in the list below «[+-]?»
Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
The character “+” «+»
The character “-” «-»
Match a single character in the range between “0” and “9” «[0-9]{1,3}»
Between one and 3 times, as many times as possible, giving back as needed (greedy) «{1,3}»
Match the regular expression below «(?:,?[0-9]{3})*»
Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
Match the character “,” literally «,?»
Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
Match a single character in the range between “0” and “9” «[0-9]{3}»
Exactly 3 times «{3}»
Match the regular expression below «(?:\.[0-9]{2})?»
Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
Match the character “.” literally «\.»
Match a single character in the range between “0” and “9” «[0-9]{2}»
Exactly 2 times «{2}»
Assert position at the end of the string (or before the line break at the end of the string, if any) «$»
一致します:
1,432.01
456.56
654,246.43
432
321,543
一致しません
454325234.31
324,123.432
,,,312,.32
123,.23
10 進数必須 (小数点以下 2 桁)
^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*\.[0-9]{2}$
説明:
number (decimal required)
^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*\.[0-9]{2}$
Options: case insensitive
Assert position at the beginning of the string «^»
Match a single character present in the list below «[+-]?»
Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
The character “+” «+»
The character “-” «-»
Match a single character in the range between “0” and “9” «[0-9]{1,3}»
Between one and 3 times, as many times as possible, giving back as needed (greedy) «{1,3}»
Match the regular expression below «(?:,?[0-9]{3})*»
Between zero and unlimited times, as many times as possible, giving back as needed (greedy) «*»
Match the character “,” literally «,?»
Between zero and one times, as many times as possible, giving back as needed (greedy) «?»
Match a single character in the range between “0” and “9” «[0-9]{3}»
Exactly 3 times «{3}»
Match the character “.” literally «\.»
Match a single character in the range between “0” and “9” «[0-9]{2}»
Exactly 2 times «{2}»
Assert position at the end of the string (or before the line break at the end of the string, if any) «$»
一致します:
1,432.01
456.56
654,246.43
324.75
一致しません:
1,43,2.01
456,
654,246
324.7523
カンマまたは小数で区切られた数字に無差別に一致します。
^(\d+(.|,))+(\d)+$
説明:
Matches Numbers Separated by , or .
^(\d+(.|,))+(\d)+$
Options: case insensitive
Match the regular expression below and capture its match into backreference number 1 «(\d+(.|,))+»
Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Note: You repeated the capturing group itself. The group will capture only the last iteration. Put a capturing group around the repeated group to capture all iterations. «+»
Match a single digit 0..9 «\d+»
Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Match the regular expression below and capture its match into backreference number 2 «(.|,)»
Match either the regular expression below (attempting the next alternative only if this one fails) «.»
Match any single character that is not a line break character «.»
Or match regular expression number 2 below (the entire group fails if this one fails to match) «,»
Match the character “,” literally «,»
Match the regular expression below and capture its match into backreference number 3 «(\d)+»
Between one and unlimited times, as many times as possible, giving back as needed (greedy) «+»
Note: You repeated the capturing group itself. The group will capture only the last iteration. Put a capturing group around the repeated group to capture all iterations. «+»
Match a single digit 0..9 «\d»
一致します:
1,32.543,2
5456.35,3.2,6.1
2,7
1.6
一致しません:
1,.2 // two ., side by side
1234,12345.5467. // ends in a .
,125 // begins in a ,
,.234 // begins in a , and two symbols side by side
123,.1245. // ends in a . and two symbols side by side
注:グループにラップしてから、グループをプルするだけです。詳細が必要な場合はお知らせください。
説明:このタイプの RegEx は、実際にはどの言語 (PHP、Python、C、C++、C#、JavaScript、jQuery など) でも機能します。これらの正規表現は、主に通貨に適しています。
于 2013-01-23T14:47:01.950 に答える
4
この正規表現を使用できます：-
/((?:[0-9]+,)*[0-9]+(?:\.[0-9]+)?)/
説明： -
/(
(?:[0-9]+,)* # Match 1 or more repetition of digit followed by a `comma`.
# Zero or more repetition of the above pattern.
[0-9]+ # Match one or more digits before `.`
(?: # A non-capturing group
\. # A dot
[0-9]+ # Digits after `.`
)? # Make the fractional part optional.
)/
于 2013-01-23T14:29:00.517 に答える
3
ドットの前にできる範囲にコンマを追加します。
/([0-9,]+\.[0-9]+)/
# ^ Comma
そして、この正規表現：
/((?:\d,?)+\d\.[0-9]*)/
のみ一致します
1,067120.01
121,34,120.01
だがしかし
,,,.01
,,1,.01
12,,,.01
# /(
# (?:\d,?) Matches a Digit followed by a optional comma
# + And at least one or more of the previous
# \d Followed by a digit (To prevent it from matching `1234,.123`)
# \.? Followed by a (optional) dot
# in case a fraction is mandatory, remove the `?` in the previous section.
# [0-9]* Followed by any number of digits --> fraction? replace the `*` with a `+`
# )/
于 2013-01-23T14:27:08.580 に答える
0
これはうまくいくはずです
preg_match('/\d{1,3}(,\d{3})*(\.\d+)?/', $s, $matches);
于 2013-01-23T14:45:52.303 に答える
0
これは素晴らしい正規表現です。これは、カンマと小数を含む数値を受け入れます。
/^-?(?:\d+|\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/
于 2014-08-04T18:23:05.963 に答える
0
ロケール認識浮動小数点 (%f) が sscanf で使用される場合があります。
$result = sscanf($s, '%f')
ただし、パーツは配列に分割されません。float を解析するだけです。
参照: http://php.net/manual/en/function.sprintf.php
正規表現のアプローチ:
/([0-9]{1,3}(?:,[0-9]{3})*\.[0-9]+)/
于 2013-01-23T14:32:57.450 に答える