如何从字符串中提取带小数(点和逗号)的数字(例如1,120.01)? 我有一个正则表达式,但似乎不能用逗号
preg_match('/([0-9]+\.[0-9]+)/', $s, $matches);
答案 0 :(得分:26)
^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*(?:\.[0-9]{2})?$
<强> Debuggex Demo 强>
<强>解释强>
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) «$»
将匹配:
1,432.01
456.56
654,246.43
432
321,543
无法匹配
454325234.31
324,123.432
,,,312,.32
123,.23
^[+-]?[0-9]{1,3}(?:,?[0-9]{3})*\.[0-9]{2}$
<强> Debuggex Demo 强>
<强>解释强>
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) «$»
将匹配:
1,432.01
456.56
654,246.43
324.75
将无法匹配:
1,43,2.01
456,
654,246
324.7523
^(\d+(.|,))+(\d)+$
<强> Debuggex Demo 强>
<强>解释强>
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»
将匹配:
1,32.543,2
5456.35,3.2,6.1
2,7
1.6
将无法匹配:
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
注意: 在一个小组中进行换行,然后只需拉出小组,如果您需要更多细节,请告诉我。
描述: 这种类型的RegEx可以使用任何语言(PHP,Python,C,C ++,C#,JavaScript,jQuery等)。这些正则表达式主要适用于货币。
答案 1 :(得分:3)
将逗号添加到可以位于点前面的范围:
/([0-9,]+\.[0-9]+)/
# ^ Comma
这个正则表达式:
/((?:\d,?)+\d\.[0-9]*)/
只会匹配
1,067120.01
121,34,120.01
但不是
,,,.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 `+`
# )/
答案 2 :(得分:3)
您可以使用此正则表达式: -
/((?:[0-9]+,)*[0-9]+(?:\.[0-9]+)?)/
说明: -
/(
(?:[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.
)/
答案 3 :(得分:0)
可识别区域设置的浮点数(%f)可能与sscanf一起使用。
$result = sscanf($s, '%f')
但是不会将部件拆分成数组。它只是解析一个浮动。
另请参阅:http://php.net/manual/en/function.sprintf.php
正则表达式方法:
/([0-9]{1,3}(?:,[0-9]{3})*\.[0-9]+)/
答案 4 :(得分:0)
这应该有效
preg_match('/\d{1,3}(,\d{3})*(\.\d+)?/', $s, $matches);
答案 5 :(得分:0)
这是一个伟大的工作正则表达式。这接受带逗号和小数的数字。
/^-?(?:\d+|\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/