regex101: PCRE (Legacy) Match Workspace

Pro

^start of line

\s*any whitespace character, repeated any number of times

Non-Capturing Group(?:(?:(?:-?(?:usd|\$)|(?:usd|\$)-)(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d)))|(?:-?(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d))(?:usd|\$)))

1st Alternative(?:(?:-?(?:usd|\$)|(?:usd|\$)-)(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d)))

Non-Capturing Group(?:(?:-?(?:usd|\$)|(?:usd|\$)-)(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d)))

Non-Capturing Group(?:-?(?:usd|\$)|(?:usd|\$)-)

1st Alternative-?(?:usd|\$)

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:usd|\$)

1st Alternativeusd

usdthe literal text usd (case sensitive)

2nd Alternative\$

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

2nd Alternative(?:usd|\$)-

Non-Capturing Group(?:usd|\$)

1st Alternativeusd

usdthe literal text usd (case sensitive)

2nd Alternative\$

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d))

Non-Capturing Group(?:0|[1-9]\d*)?

?repeats the group contents below at most once:

1st Alternative0

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative[1-9]\d*

Character Class[1-9]

1-9one character from 1 (49₁₀) to 9 (57₁₀)

\d*a digit, repeated any number of times

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Positive Lookbehind(?<=\d)

\da digit

2nd Alternative(?:-?(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d))(?:usd|\$))

Non-Capturing Group(?:-?(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d))(?:usd|\$))

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d))

Non-Capturing Group(?:0|[1-9]\d*)?

?repeats the group contents below at most once:

1st Alternative0

0the literal 0 (48₁₀ / 60₈ / 30₁₆)

2nd Alternative[1-9]\d*

Character Class[1-9]

\d*a digit, repeated any number of times

Non-Capturing Group(?:\.\d+)?

Positive Lookbehind(?<=\d)

Non-Capturing Group(?:usd|\$)

\s*any whitespace character, repeated any number of times

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

25 tokens

Regular Expression

^\s*(?:(?:(?:-?(?:usd|\$)|(?:usd|\$)-)(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d)))|(?:-?(?:(?:0|[1-9]\d*)?(?:\.\d+)?(?<=\d))(?:usd|\$)))\s*$

New

 $456 
 $45.6
 $.5
 $-45
 -$45
 usd-456
 usd46
 usd4.6
 usd.46
 1$
 1.5$
 .5$
 -.5$
 5usd
 456usd
------------
  $000
  $.
  00.0$
  455$abc
  abc$123
  abcuds1
  jhb$5665usdjnjnb
  $usd1555
  usd$768
  $566usd
  $5788usdbjhj

Substitution

 $456 
 $45.6
 $.5
 $-45
 -$45
 usd-456
 usd46
 usd4.6
 usd.46
 1$
 1.5$
 .5$
 -.5$
 5usd
 456usd
------------
  $000
  $.
  00.0$
  455$abc
  abc$123
  abcuds1
  jhb$5665usdjnjnb
  $usd1555
  usd$768
  $566usd
  $5788usdbjhj