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

/
/
gm

Test String

Code Generator

Generated Code

// include the latest version of the regex crate in your Cargo.toml extern crate regex; use regex::Regex; fn main() { let regex = Regex::new(r"(?m)administrator").unwrap(); let string = "{ \"switch_themes\":true, \"edit_themes\":true, \"activate_plugins\":true, \"edit_plugins\":true, \"edit_users\":true, \"edit_files\":true, \"manage_options\":true, \"moderate_comments\":true, \"manage_categories\":true, \"manage_links\":true, \"upload_files\":true, \"import\":true, \"unfiltered_html\":true, \"edit_posts\":true, \"edit_others_posts\":true, \"edit_published_posts\":true, \"publish_posts\":true, \"edit_pages\":true, \"read\":true, \"level_10\":true, \"level_9\":true, \"level_8\":true, \"level_7\":true, \"level_6\":true, \"level_5\":true, \"level_4\":true, \"level_3\":true, \"level_2\":true, \"level_1\":true, \"level_0\":true, \"edit_others_pages\":true, \"edit_published_pages\":true, \"publish_pages\":true, \"delete_pages\":true, \"delete_others_pages\":true, \"delete_published_pages\":true, \"delete_posts\":true, \"delete_others_posts\":true, \"delete_published_posts\":true, \"delete_private_posts\":true, \"edit_private_posts\":true, \"read_private_posts\":true, \"delete_private_pages\":true, \"edit_private_pages\":true, \"read_private_pages\":true, \"delete_users\":true, \"create_users\":true, \"unfiltered_upload\":true, \"edit_dashboard\":true, \"update_plugins\":true, \"delete_plugins\":true, \"install_plugins\":true, \"update_themes\":true, \"install_themes\":true, \"update_core\":true, \"list_users\":true, \"remove_users\":true, \"promote_users\":true, \"edit_theme_options\":true, \"delete_themes\":true, \"export\":true, \"edit_rcb-cookie\":true, \"read_rcb-cookie\":true, \"delete_rcb-cookie\":true, \"edit_rcb-cookies\":true, \"edit_others_rcb-cookies\":true, \"publish_rcb-cookies\":true, \"read_private_rcb-cookies\":true, \"delete_rcb-cookies\":true, \"delete_private_rcb-cookies\":true, \"delete_published_rcb-cookies\":true, \"delete_others_rcb-cookies\":true, \"edit_private_rcb-cookies\":true, \"edit_published_rcb-cookies\":true, \"edit_rcb-blocker\":true, \"read_rcb-blocker\":true, \"delete_rcb-blocker\":true, \"edit_rcb-blockers\":true, \"edit_others_rcb-blockers\":true, \"publish_rcb-blockers\":true, \"read_private_rcb-blockers\":true, \"delete_rcb-blockers\":true, \"delete_private_rcb-blockers\":true, \"delete_published_rcb-blockers\":true, \"delete_others_rcb-blockers\":true, \"edit_private_rcb-blockers\":true, \"edit_published_rcb-blockers\":true, \"edit_rcb-tcf-vendor-conf\":true, \"read_rcb-tcf-vendor-conf\":true, \"delete_rcb-tcf-vendor-conf\":true, \"edit_rcb-tcf-vendor-confs\":true, \"edit_others_rcb-tcf-vendor-confs\":true, \"publish_rcb-tcf-vendor-confs\":true, \"read_private_rcb-tcf-vendor-confs\":true, \"delete_rcb-tcf-vendor-confs\":true, \"delete_private_rcb-tcf-vendor-confs\":true, \"delete_published_rcb-tcf-vendor-confs\":true, \"delete_others_rcb-tcf-vendor-confs\":true, \"edit_private_rcb-tcf-vendor-confs\":true, \"edit_published_rcb-tcf-vendor-confs\":true, \"loco_admin\":true, \"manage_woocommerce\":true, \"view_woocommerce_reports\":true, \"edit_product\":true, \"read_product\":true, \"delete_product\":true, \"edit_products\":true, \"edit_others_products\":true, \"publish_products\":true, \"read_private_products\":true, \"delete_products\":true, \"delete_private_products\":true, \"delete_published_products\":true, \"delete_others_products\":true, \"edit_private_products\":true, \"edit_published_products\":true, \"manage_product_terms\":true, \"edit_product_terms\":true, \"delete_product_terms\":true, \"assign_product_terms\":true, \"edit_shop_order\":true, \"read_shop_order\":true, \"delete_shop_order\":true, \"edit_shop_orders\":true, \"edit_others_shop_orders\":true, \"publish_shop_orders\":true, \"read_private_shop_orders\":true, \"delete_shop_orders\":true, \"delete_private_shop_orders\":true, \"delete_published_shop_orders\":true, \"delete_others_shop_orders\":true, \"edit_private_shop_orders\":true, \"edit_published_shop_orders\":true, \"manage_shop_order_terms\":true, \"edit_shop_order_terms\":true, \"delete_shop_order_terms\":true, \"assign_shop_order_terms\":true, \"edit_shop_coupon\":true, \"read_shop_coupon\":true, \"delete_shop_coupon\":true, \"edit_shop_coupons\":true, \"edit_others_shop_coupons\":true, \"publish_shop_coupons\":true, \"read_private_shop_coupons\":true, \"delete_shop_coupons\":true, \"delete_private_shop_coupons\":true, \"delete_published_shop_coupons\":true, \"delete_others_shop_coupons\":true, \"edit_private_shop_coupons\":true, \"edit_published_shop_coupons\":true, \"manage_shop_coupon_terms\":true, \"edit_shop_coupon_terms\":true, \"delete_shop_coupon_terms\":true, \"assign_shop_coupon_terms\":true, \"wpml_manage_translation_management\":true, \"wpml_manage_languages\":true, \"wpml_manage_theme_and_plugin_localization\":true, \"wpml_manage_support\":true, \"wpml_manage_woocommerce_multilingual\":true, \"wpml_operate_woocommerce_multilingual\":true, \"wpml_manage_media_translation\":true, \"wpml_manage_navigation\":true, \"wpml_manage_sticky_links\":true, \"wpml_manage_string_translation\":true, \"wpml_manage_translation_analytics\":true, \"wpml_manage_wp_menus_sync\":true, \"wpml_manage_taxonomy_translation\":true, \"wpml_manage_troubleshooting\":true, \"wpml_manage_translation_options\":true, \"wpgmp_admin_overview\":true, \"wpgmp_how_overview\":true, \"wpgmp_form_location\":true, \"wpgmp_manage_location\":true, \"wpgmp_form_map\":true, \"wpgmp_manage_map\":true, \"wpgmp_form_group_map\":true, \"wpgmp_manage_group_map\":true, \"wpgmp_manage_settings\":true, \"wpgmp_manage_extentions\":true, \"wp-piwik_read_stats\":true, \"manage_instagram_feed_options\":true, \"edit_dzsap_items\":true, \"edit_others_dzsap_items\":true, \"rank_math_edit_htaccess\":true, \"rank_math_titles\":true, \"rank_math_general\":true, \"rank_math_sitemap\":true, \"rank_math_404_monitor\":true, \"rank_math_link_builder\":true, \"rank_math_redirections\":true, \"rank_math_role_manager\":true, \"rank_math_analytics\":true, \"rank_math_site_analysis\":true, \"rank_math_onpage_analysis\":true, \"rank_math_onpage_general\":true, \"rank_math_onpage_advanced\":true, \"rank_math_onpage_snippet\":true, \"rank_math_onpage_social\":true, \"rank_math_admin_bar\":true, \"frm_view_forms\":true, \"frm_edit_forms\":true, \"frm_delete_forms\":true, \"frm_change_settings\":true, \"frm_view_entries\":true, \"frm_delete_entries\":true, \"administrator\":true, \"manage_translations\":true, \"install_languages\":true, \"resume_plugins\":true, \"resume_themes\":true, \"view_site_health_checks\":true, \"view_query_monitor\":true }"; // result will be an iterator over tuples containing the start and end indices for each match in the string let result = regex.captures_iter(string); for mat in result { println!("{:?}", mat); } }

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 Rust, please visit: https://docs.rs/regex/latest/regex/