Regular Expressions 101

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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
No Match

/
/
g

Test String

Code Generator

Language

Generated Code

$re = '/^[^\t]*/'; $str = '__consumer_offsets 50 3 compact 11.5 kB _schemas 1 3 compact 576 B euler.public.apartment 1 3 delete 2.53 GB euler.public.apartment_accounts 1 3 delete 159 MB euler.public.apartment_bind_qr_codes 1 3 delete 4.73 MB euler.public.apartment_cameras 1 3 delete 65.7 MB euler.public.apartment_favorites 1 3 delete 2.97 MB euler.public.apartment_plans 1 3 delete 114 kB euler.public.apartment_property 1 3 delete 2.28 MB euler.public.apartment_scope_access_rel 1 3 delete 17.7 kB euler.public.app_schema 1 3 delete 1.67 MB euler.public.board_map_buildings_tags 1 3 delete 961 kB euler.public.building 1 3 delete 18.7 MB euler.public.building_cameras 1 3 delete 940 kB euler.public.building_coordinates 1 3 delete 729 kB euler.public.building_enterprise 1 3 delete 407 kB euler.public.building_images 1 3 delete 136 kB euler.public.business_center 1 3 delete 6.04 kB euler.public.cctv_cameras_apartments 1 3 delete 422 MB euler.public.cctv_cameras_buildings 1 3 delete 7.57 MB euler.public.cctv_cameras_complex 1 3 delete 2.58 kB euler.public.cctv_cameras_entrances 1 3 delete 3.65 MB euler.public.cctv_cameras_properties 1 3 delete 2.56 MB euler.public.comparison_of_meters_readings_buildings_rel 1 3 delete 110 kB euler.public.comparison_of_meters_readings_registry 1 3 delete 1.3 MB euler.public.complex 1 3 delete 2.16 MB euler.public.complexes_mortgage 1 3 delete 1.37 kB euler.public.construction_stage_configuration 1 3 delete 7.84 kB euler.public.debtors 1 3 delete 4.07 kB euler.public.device 1 3 delete 5.66 GB euler.public.enterprises_buildings 1 3 delete 1.66 MB euler.public.entrance 1 3 delete 8.17 MB euler.public.guard_manual_vehicle_parking_slot_rel 1 3 delete 221 kB euler.public.house_vote_answers_signature 1 3 delete 121 kB euler.public.house_vote_building_rel 1 3 delete 285 kB euler.public.journal 1 3 delete 419 MB euler.public.long_term_events 1 3 delete 9.7 GB euler.public.news 1 3 delete 36.1 MB euler.public.news_ext_building_rel 1 3 delete 16.8 MB euler.public.parking_history 1 3 delete 1.92 MB euler.public.parking_lots 1 3 delete 371 kB euler.public.parking_lots_buildings 1 3 delete 536 kB euler.public.parking_rent_enterprises 1 3 delete 2.6 MB euler.public.parking_slot_loading_zone_rel 1 3 delete 2.69 kB euler.public.parking_slot_reservation 1 3 delete 81.7 MB euler.public.parking_slots 1 3 delete 82.6 MB euler.public.parking_slots_vehicles 1 3 delete 4.75 MB euler.public.parking_zones 1 3 delete 636 kB euler.public.parking_zones_price 1 3 delete 134 kB euler.public.polls_buildings 1 3 delete 625 kB euler.public.private_parking_slot_invoice 1 3 delete 65.4 kB euler.public.properties 1 3 delete 4.82 MB euler.public.properties_ownership_archive 1 3 delete 338 kB euler.public.property_buildings 1 3 delete 3.35 MB euler.public.property_external_crm_relation 1 3 delete 24.1 kB euler.public.property_photo 1 3 delete 103 kB euler.public.rents 1 3 delete 4.79 MB euler.public.rooms 1 3 delete 79.5 MB euler.public.scud_pass 1 3 delete 5.23 GB euler.public.scud_pass_apartment_rel 1 3 delete 241 kB euler.public.service_meters 1 3 delete 84.1 kB euler.public.splashscreens 1 3 delete 8.7 kB euler.public.stories_building_rel 1 3 delete 30.3 kB euler.public.stories_complex_rel 1 3 delete 2.56 kB euler.public.stuff_pass 1 3 delete 36 MB euler.public.stuff_pass_car_parking 1 3 delete 14.2 MB euler.public.ticket_external_service_building_rel 1 3 delete 43.6 kB euler.public.ticket_type_building_rel 1 3 delete 28.4 kB euler.public.tickets 1 3 delete 122 MB euler.public.tri_device_object_rel 1 3 delete 27.9 kB euler.public.tri_geo_point_object_rel 1 3 delete 7.75 kB euler.public.user_apartment_compl 1 3 delete 1.1 GB euler.public.user_apartment_requests 1 3 delete 14.5 MB euler.public.userdata_buildings 1 3 delete 3.08 kB euler.public.userdata_business 1 3 delete 10.3 MB euler.public.userdata_parking_slots 1 3 delete 35.6 MB euler.public.userdata_properties 1 3 delete 536 kB euler.public.userdata_property_rel 1 3 delete 1.27 MB euler.public.userdata_statuses_rel 1 3 delete 63.8 MB euler.public.userdata_titles 1 3 delete 264 kB uni_configs 1 1 compact 29.6 kB uni_offsets 25 1 compact 2.79 kB uni_statuses 5 1 compact 277 kB '; preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0); // Print the entire match result var_dump($matches);

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