Regular Expressions 101

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  • All Tokens
  • Common Tokens
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  • Quantifiers
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  • 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
No Match

/
/
gs

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

$re = '/(?<System1>SYSTEM *\n *?TYPE *= )HP(?<System2>.*?FURNACE-HIR +?= [.0-9]+)\n(?<System3>.*?\.\.\n)(?<ZoneName>\".*?\")/s'; $str = '"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" ..'; $subst = "${System1}PSZ${System2}\n CONTROL-ZONE = ${ZoneName}\n${System3}${ZoneName}"; $result = preg_replace($re, $subst, $str); echo "The result of the substitution is ".$result;

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 PHP, please visit: http://php.net/manual/en/ref.pcre.php