Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/
gs

Test String

Substitution

Processing...

Code Generator

Generated Code

# If you'd like to omit non-matching lines from the result; add ';d' to the end of the expression. sed -E 's/(?<System1>SYSTEM *\n *?TYPE *= )HP(?<System2>.*?FURNACE-HIR +?= [.0-9]+)\n(?<System3>.*?\.\.\n)(?<ZoneName>\".*?\")/${System1}PSZ${System2}\n CONTROL-ZONE = ${ZoneName}\n${System3}${ZoneName}/gs;t' <<< "\"EL1 Sys1 (PTAC) (G.SSW1)\" = SYSTEM TYPE = PSZ HEAT-SOURCE = HEAT-PUMP ZONE-HEAT-SOURCE = NONE SIZING-RATIO = 1 COOL-SIZING-RATI = 1 MIN-SUPPLY-T = 58 FAN-SCHEDULE = \"S1 Sys1 (PTAC) Fan Sch\" CW-LOOP = \"DEFAULT-CW\" COOLING-CAPACITY = 15752 COOL-SH-CAP = 11839 HP-SUPP-SOURCE = NONE FURNACE-HIR = 1.24067 CONTROL-ZONE = \"EL1 SSW Perim Zn (G.SSW1)\" C-EER95 = 8.24 C-COP47 = 0.78 C-AFUE = 0.78 C-SF-MTR-TYPE = 1 C-RF-MTR-TYPE = 1 C-OSA-DMPR-CTRL = 1 C-HTG-DUCT-LOCN = *Ceiling Plenum* C-HTG-DUCT-RVAL = 7 C-CLG-DUCT-LOCN = *Ceiling Plenum* C-CLG-DUCT-RVAL = 7 C-CLG-CAP-CATEG = 14 .. \"EL1 SSW Perim Zn (G.SSW1)\" = ZONE TYPE = CONDITIONED MIN-FLOW-RATIO = 1 FLOW/AREA = 0.5 OUTSIDE-AIR-FLOW = 96 EXHAUST-FLOW = 80 DESIGN-HEAT-T = 72 HEAT-TEMP-SCH = \"S1 Sys1 (PTAC) Heat Sch\" DESIGN-COOL-T = 75 COOL-TEMP-SCH = \"S1 Sys1 (PTAC) Cool Sch\" BASEBOARD-CTRL = THERMOSTATIC SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 SSW Perim Spc (G.SSW1)\" C-COMPLIANCE-DHW = \"Res Compliance DHW\" .. \"EL1 SSW Perim Pl Zn (G.SSW38)\" = ZONE TYPE = UNCONDITIONED DESIGN-HEAT-T = 72 DESIGN-COOL-T = 81 SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 SSW Perim Plnm (G.SSW38)\" .. \"EL1 Sys1 (PTAC) (G.W2)\" = SYSTEM TYPE = HP SIZING-RATIO = 1 COOL-SIZING-RATI = 1 MIN-SUPPLY-T = 58 FAN-SCHEDULE = \"S1 Sys1 (PTAC) Fan Sch\" CW-LOOP = \"DEFAULT-CW\" COOLING-CAPACITY = 15752 COOL-SH-CAP = 11839 FURNACE-HIR = 1.24067 HEAT-ELEC-METER = \"Electric Meter 2\" COOL-ELEC-METER = \"Electric Meter 2\" C-EER95 = 8.24 C-COP47 = 0.78 C-AFUE = 0.78 C-SF-MTR-TYPE = 1 C-RF-MTR-TYPE = 1 C-OSA-DMPR-CTRL = 1 C-HTG-DUCT-LOCN = *Ceiling Plenum* C-HTG-DUCT-RVAL = 7 C-CLG-DUCT-LOCN = *Ceiling Plenum* C-CLG-DUCT-RVAL = 7 C-CLG-CAP-CATEG = 14 .. \"EL1 West Perim Zn (G.W2)\" = ZONE TYPE = CONDITIONED MIN-FLOW-RATIO = 1 COOLING-CAPACITY = 15752 COOL-SH-CAP = 11839 BASEBOARD-RATING = -20481.2 FLOW/AREA = 0.5 OUTSIDE-AIR-FLOW = 96 EXHAUST-FLOW = 80 DESIGN-HEAT-T = 72 HEAT-TEMP-SCH = \"S1 Sys1 (PTAC) Heat Sch\" DESIGN-COOL-T = 75 COOL-TEMP-SCH = \"S1 Sys1 (PTAC) Cool Sch\" BASEBOARD-CTRL = THERMOSTATIC SIZING-OPTION = ADJUST-LOADS CW-LOOP = \"DEFAULT-CW\" SPACE = \"EL1 West Perim Spc (G.W2)\" C-COMPLIANCE-DHW = \"Res Compliance DHW\" .. \"EL1 West Perim Pl Zn (G.W39)\" = ZONE TYPE = UNCONDITIONED DESIGN-HEAT-T = 72 DESIGN-COOL-T = 81 SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Plnm (G.W39)\" .. \"EL1 Sys1 (PTAC) (G.W3)\" = SYSTEM TYPE = HP SIZING-RATIO = 1 COOL-SIZING-RATI = 1 MIN-SUPPLY-T = 58 FAN-SCHEDULE = \"S1 Sys1 (PTAC) Fan Sch\" CW-LOOP = \"DEFAULT-CW\" COOLING-CAPACITY = 15752 COOL-SH-CAP = 11839 FURNACE-HIR = 1.24067 HEAT-ELEC-METER = \"Electric Meter 2\" COOL-ELEC-METER = \"Electric Meter 2\" C-EER95 = 8.24 C-COP47 = 0.78 C-AFUE = 0.78 C-SF-MTR-TYPE = 1 C-RF-MTR-TYPE = 1 C-OSA-DMPR-CTRL = 1 C-HTG-DUCT-LOCN = *Ceiling Plenum* C-HTG-DUCT-RVAL = 7 C-CLG-DUCT-LOCN = *Ceiling Plenum* C-CLG-DUCT-RVAL = 7 C-CLG-CAP-CATEG = 14 .. \"EL1 West Perim Zn (G.W3)\" = ZONE TYPE = CONDITIONED MIN-FLOW-RATIO = 1 BASEBOARD-RATING = -20778.4 FLOW/AREA = 0.5 OUTSIDE-AIR-FLOW = 96 EXHAUST-FLOW = 80 DESIGN-HEAT-T = 72 HEAT-TEMP-SCH = \"S1 Sys1 (PTAC) Heat Sch\" DESIGN-COOL-T = 75 COOL-TEMP-SCH = \"S1 Sys1 (PTAC) Cool Sch\" BASEBOARD-CTRL = THERMOSTATIC SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Spc (G.W3)\" C-COMPLIANCE-DHW = \"Res Compliance DHW\" .. \"EL1 West Perim Pl Zn (G.W40)\" = ZONE TYPE = UNCONDITIONED DESIGN-HEAT-T = 72 DESIGN-COOL-T = 81 SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Plnm (G.W40)\" .. \"EL1 Sys1 (PTAC) (G.W4)\" = SYSTEM TYPE = HP SIZING-RATIO = 1 COOL-SIZING-RATI = 1 MIN-SUPPLY-T = 58 FAN-SCHEDULE = \"S1 Sys1 (PTAC) Fan Sch\" CW-LOOP = \"DEFAULT-CW\" COOLING-CAPACITY = 15752 COOL-SH-CAP = 11839 FURNACE-HIR = 1.24067 HEAT-ELEC-METER = \"Electric Meter 2\" COOL-ELEC-METER = \"Electric Meter 2\" C-EER95 = 8.24 C-COP47 = 0.78 C-AFUE = 0.78 C-SF-MTR-TYPE = 1 C-RF-MTR-TYPE = 1 C-OSA-DMPR-CTRL = 1 C-HTG-DUCT-LOCN = *Ceiling Plenum* C-HTG-DUCT-RVAL = 7 C-CLG-DUCT-LOCN = *Ceiling Plenum* C-CLG-DUCT-RVAL = 7 C-CLG-CAP-CATEG = 14 .. \"EL1 West Perim Zn (G.W4)\" = ZONE TYPE = CONDITIONED MIN-FLOW-RATIO = 1 BASEBOARD-RATING = -20671 FLOW/AREA = 0.5 OUTSIDE-AIR-FLOW = 96 EXHAUST-FLOW = 80 DESIGN-HEAT-T = 72 HEAT-TEMP-SCH = \"S1 Sys1 (PTAC) Heat Sch\" DESIGN-COOL-T = 75 COOL-TEMP-SCH = \"S1 Sys1 (PTAC) Cool Sch\" BASEBOARD-CTRL = THERMOSTATIC SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Spc (G.W4)\" C-COMPLIANCE-DHW = \"Res Compliance DHW\" .. \"EL1 West Perim Pl Zn (G.W41)\" = ZONE TYPE = UNCONDITIONED DESIGN-HEAT-T = 72 DESIGN-COOL-T = 81 SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Plnm (G.W41)\" .. \"EL1 Sys1 (PTAC) (G.W5)\" = SYSTEM TYPE = HP SIZING-RATIO = 1 COOL-SIZING-RATI = 1 MIN-SUPPLY-T = 58 FAN-SCHEDULE = \"S1 Sys1 (PTAC) Fan Sch\" CW-LOOP = \"DEFAULT-CW\" COOLING-CAPACITY = 15752 COOL-SH-CAP = 11839 FURNACE-HIR = 1.24067 HEAT-ELEC-METER = \"Electric Meter 2\" COOL-ELEC-METER = \"Electric Meter 2\" C-EER95 = 8.24 C-COP47 = 0.78 C-AFUE = 0.78 C-SF-MTR-TYPE = 1 C-RF-MTR-TYPE = 1 C-OSA-DMPR-CTRL = 1 C-HTG-DUCT-LOCN = *Ceiling Plenum* C-HTG-DUCT-RVAL = 7 C-CLG-DUCT-LOCN = *Ceiling Plenum* C-CLG-DUCT-RVAL = 7 C-CLG-CAP-CATEG = 14 .. \"EL1 West Perim Zn (G.W5)\" = ZONE TYPE = CONDITIONED MIN-FLOW-RATIO = 1 BASEBOARD-RATING = -20649.5 FLOW/AREA = 0.5 OUTSIDE-AIR-FLOW = 96 EXHAUST-FLOW = 80 DESIGN-HEAT-T = 72 HEAT-TEMP-SCH = \"S1 Sys1 (PTAC) Heat Sch\" DESIGN-COOL-T = 75 COOL-TEMP-SCH = \"S1 Sys1 (PTAC) Cool Sch\" BASEBOARD-CTRL = THERMOSTATIC SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Spc (G.W5)\" C-COMPLIANCE-DHW = \"Res Compliance DHW\" .. \"EL1 West Perim Pl Zn (G.W42)\" = ZONE TYPE = UNCONDITIONED DESIGN-HEAT-T = 72 DESIGN-COOL-T = 81 SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Plnm (G.W42)\" .. \"EL1 Sys1 (PTAC) (G.W6)\" = SYSTEM TYPE = HP SIZING-RATIO = 1 COOL-SIZING-RATI = 1 MIN-SUPPLY-T = 58 FAN-SCHEDULE = \"S1 Sys1 (PTAC) Fan Sch\" CW-LOOP = \"DEFAULT-CW\" COOLING-CAPACITY = 15752 COOL-SH-CAP = 11839 FURNACE-HIR = 1.24067 HEAT-ELEC-METER = \"Electric Meter 2\" COOL-ELEC-METER = \"Electric Meter 2\" C-EER95 = 8.24 C-COP47 = 0.78 C-AFUE = 0.78 C-SF-MTR-TYPE = 1 C-RF-MTR-TYPE = 1 C-OSA-DMPR-CTRL = 1 C-HTG-DUCT-LOCN = *Ceiling Plenum* C-HTG-DUCT-RVAL = 7 C-CLG-DUCT-LOCN = *Ceiling Plenum* C-CLG-DUCT-RVAL = 7 C-CLG-CAP-CATEG = 14 .. \"EL1 West Perim Zn (G.W6)\" = ZONE TYPE = CONDITIONED MIN-FLOW-RATIO = 1 BASEBOARD-RATING = -20499.1 FLOW/AREA = 0.5 OUTSIDE-AIR-FLOW = 96 EXHAUST-FLOW = 80 DESIGN-HEAT-T = 72 HEAT-TEMP-SCH = \"S1 Sys1 (PTAC) Heat Sch\" DESIGN-COOL-T = 75 COOL-TEMP-SCH = \"S1 Sys1 (PTAC) Cool Sch\" BASEBOARD-CTRL = THERMOSTATIC SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Spc (G.W6)\" C-COMPLIANCE-DHW = \"Res Compliance DHW\" .. \"EL1 West Perim Pl Zn (G.W43)\" = ZONE TYPE = UNCONDITIONED DESIGN-HEAT-T = 72 DESIGN-COOL-T = 81 SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Plnm (G.W43)\" .. \"EL1 Sys1 (PTAC) (G.W7)\" = SYSTEM TYPE = HP SIZING-RATIO = 1 COOL-SIZING-RATI = 1 MIN-SUPPLY-T = 58 FAN-SCHEDULE = \"S1 Sys1 (PTAC) Fan Sch\" CW-LOOP = \"DEFAULT-CW\" COOLING-CAPACITY = 15752 COOL-SH-CAP = 11839 FURNACE-HIR = 1.24067 HEAT-ELEC-METER = \"Electric Meter 2\" COOL-ELEC-METER = \"Electric Meter 2\" C-EER95 = 8.24 C-COP47 = 0.78 C-AFUE = 0.78 C-SF-MTR-TYPE = 1 C-RF-MTR-TYPE = 1 C-OSA-DMPR-CTRL = 1 C-HTG-DUCT-LOCN = *Ceiling Plenum* C-HTG-DUCT-RVAL = 7 C-CLG-DUCT-LOCN = *Ceiling Plenum* C-CLG-DUCT-RVAL = 7 C-CLG-CAP-CATEG = 14 .. \"EL1 West Perim Zn (G.W7)\" = ZONE TYPE = CONDITIONED MIN-FLOW-RATIO = 1 BASEBOARD-RATING = -20649.5 FLOW/AREA = 0.5 OUTSIDE-AIR-FLOW = 96 EXHAUST-FLOW = 80 DESIGN-HEAT-T = 72 HEAT-TEMP-SCH = \"S1 Sys1 (PTAC) Heat Sch\" DESIGN-COOL-T = 75 COOL-TEMP-SCH = \"S1 Sys1 (PTAC) Cool Sch\" BASEBOARD-CTRL = THERMOSTATIC SIZING-OPTION = ADJUST-LOADS SPACE = \"EL1 West Perim Spc (G.W7)\" C-COMPLIANCE-DHW = \"Res Compliance DHW\" .."

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for SED, please visit: https://www.gnu.org/software/sed/manual/html_node/The-_0022s_0022-Command.html