Regular Expressions 101

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  • 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

Substitution

Processing...

Code Generator

Language

Generated Code

$re = '/(\d\.*\d)*.+(fa-.+)\s\[&#x(.{4});\]/'; $str = ' fa-500px [&#xf26e;]  fa-adjust [&#xf042;]  fa-adn [&#xf170;]  fa-align-center [&#xf037;]  fa-align-justify [&#xf039;]  fa-align-left [&#xf036;]  fa-align-right [&#xf038;] 4.4  fa-amazon [&#xf270;]  fa-ambulance [&#xf0f9;] 4.6  fa-american-sign-language-interpreting [&#xf2a3;]  fa-anchor [&#xf13d;]  fa-android [&#xf17b;] 4.2  fa-angellist [&#xf209;]  fa-angle-double-down [&#xf103;]  fa-angle-double-left [&#xf100;]  fa-angle-double-right [&#xf101;]  fa-angle-double-up [&#xf102;]  fa-angle-down [&#xf107;]  fa-angle-left [&#xf104;]  fa-angle-right [&#xf105;]  fa-angle-up [&#xf106;]  fa-apple [&#xf179;]  fa-archive [&#xf187;] 4.2  fa-area-chart [&#xf1fe;]  fa-arrow-circle-down [&#xf0ab;]  fa-arrow-circle-left [&#xf0a8;]  fa-arrow-circle-o-down [&#xf01a;] 4.0  fa-arrow-circle-o-left [&#xf190;] 4.0  fa-arrow-circle-o-right [&#xf18e;]  fa-arrow-circle-o-up [&#xf01b;]  fa-arrow-circle-right [&#xf0a9;]  fa-arrow-circle-up [&#xf0aa;]  fa-arrow-down [&#xf063;]  fa-arrow-left [&#xf060;]  fa-arrow-right [&#xf061;]  fa-arrow-up [&#xf062;]  fa-arrows [&#xf047;]  fa-arrows-alt [&#xf0b2;]  fa-arrows-h [&#xf07e;]  fa-arrows-v [&#xf07d;] 4.6  fa-asl-interpreting (alias) [&#xf2a3;] 4.6  fa-assistive-listening-systems [&#xf2a2;]  fa-asterisk [&#xf069;] 4.2  fa-at [&#xf1fa;] 4.6  fa-audio-description [&#xf29e;] 4.1  fa-automobile (alias) [&#xf1b9;]  fa-backward [&#xf04a;] 4.4  fa-balance-scale [&#xf24e;]  fa-ban [&#xf05e;] 4.1  fa-bank (alias) [&#xf19c;]  fa-bar-chart [&#xf080;]  fa-bar-chart-o (alias) [&#xf080;]  fa-barcode [&#xf02a;]  fa-bars [&#xf0c9;] 4.4  fa-battery-0 (alias) [&#xf244;] 4.4  fa-battery-1 (alias) [&#xf243;] 4.4  fa-battery-2 (alias) [&#xf242;] 4.4  fa-battery-3 (alias) [&#xf241;] 4.4  fa-battery-4 (alias) [&#xf240;] 4.4  fa-battery-empty [&#xf244;] 4.4  fa-battery-full [&#xf240;] 4.4  fa-battery-half [&#xf242;] 4.4  fa-battery-quarter [&#xf243;] 4.4  fa-battery-three-quarters [&#xf241;] 4.3  fa-bed [&#xf236;]  fa-beer [&#xf0fc;] 4.1  fa-behance [&#xf1b4;] 4.1  fa-behance-square [&#xf1b5;]  fa-bell [&#xf0f3;]  fa-bell-o [&#xf0a2;] 4.2  fa-bell-slash [&#xf1f6;] 4.2  fa-bell-slash-o [&#xf1f7;] 4.2  fa-bicycle [&#xf206;] 4.2  fa-binoculars [&#xf1e5;] 4.2  fa-birthday-cake [&#xf1fd;]  fa-bitbucket [&#xf171;]  fa-bitbucket-square [&#xf172;]  fa-bitcoin (alias) [&#xf15a;] 4.4  fa-black-tie [&#xf27e;] 4.6  fa-blind [&#xf29d;] 4.5  fa-bluetooth [&#xf293;] 4.5  fa-bluetooth-b [&#xf294;]  fa-bold [&#xf032;]  fa-bolt [&#xf0e7;] 4.1  fa-bomb [&#xf1e2;]  fa-book [&#xf02d;]  fa-bookmark [&#xf02e;]  fa-bookmark-o [&#xf097;] 4.6  fa-braille [&#xf2a1;]  fa-briefcase [&#xf0b1;]  fa-btc [&#xf15a;]  fa-bug [&#xf188;] 4.1  fa-building [&#xf1ad;]  fa-building-o [&#xf0f7;]  fa-bullhorn [&#xf0a1;]  fa-bullseye [&#xf140;] 4.2  fa-bus [&#xf207;] 4.3  fa-buysellads [&#xf20d;] 4.1  fa-cab (alias) [&#xf1ba;] 4.2  fa-calculator [&#xf1ec;]  fa-calendar [&#xf073;] 4.4  fa-calendar-check-o [&#xf274;] 4.4  fa-calendar-minus-o [&#xf272;]  fa-calendar-o [&#xf133;] 4.4  fa-calendar-plus-o [&#xf271;] 4.4  fa-calendar-times-o [&#xf273;]  fa-camera [&#xf030;]  fa-camera-retro [&#xf083;] 4.1  fa-car [&#xf1b9;]  fa-caret-down [&#xf0d7;]  fa-caret-left [&#xf0d9;]  fa-caret-right [&#xf0da;]  fa-caret-square-o-down [&#xf150;] 4.0  fa-caret-square-o-left [&#xf191;]  fa-caret-square-o-right [&#xf152;]  fa-caret-square-o-up [&#xf151;]  fa-caret-up [&#xf0d8;] 4.3  fa-cart-arrow-down [&#xf218;] 4.3  fa-cart-plus [&#xf217;] 4.2  fa-cc [&#xf20a;] 4.2  fa-cc-amex [&#xf1f3;] 4.4  fa-cc-diners-club [&#xf24c;] 4.2  fa-cc-discover [&#xf1f2;] 4.4  fa-cc-jcb [&#xf24b;] 4.2  fa-cc-mastercard [&#xf1f1;] 4.2  fa-cc-paypal [&#xf1f4;] 4.2  fa-cc-stripe [&#xf1f5;] 4.2  fa-cc-visa [&#xf1f0;]  fa-certificate [&#xf0a3;]  fa-chain (alias) [&#xf0c1;]  fa-chain-broken [&#xf127;]  fa-check [&#xf00c;]  fa-check-circle [&#xf058;]  fa-check-circle-o [&#xf05d;]  fa-check-square [&#xf14a;]  fa-check-square-o [&#xf046;]  fa-chevron-circle-down [&#xf13a;]  fa-chevron-circle-left [&#xf137;]  fa-chevron-circle-right [&#xf138;]  fa-chevron-circle-up [&#xf139;]  fa-chevron-down [&#xf078;]  fa-chevron-left [&#xf053;]  fa-chevron-right [&#xf054;]  fa-chevron-up [&#xf077;] 4.1  fa-child [&#xf1ae;] 4.4  fa-chrome [&#xf268;]  fa-circle [&#xf111;]  fa-circle-o [&#xf10c;] 4.1  fa-circle-o-notch [&#xf1ce;] 4.1  fa-circle-thin [&#xf1db;]  fa-clipboard [&#xf0ea;]  fa-clock-o [&#xf017;] 4.4  fa-clone [&#xf24d;]  fa-close (alias) [&#xf00d;]  fa-cloud [&#xf0c2;]  fa-cloud-download [&#xf0ed;]  fa-cloud-upload [&#xf0ee;]  fa-cny (alias) [&#xf157;]  fa-code [&#xf121;]  fa-code-fork [&#xf126;] 4.1  fa-codepen [&#xf1cb;] 4.5  fa-codiepie [&#xf284;]  fa-coffee [&#xf0f4;]  fa-cog [&#xf013;]  fa-cogs [&#xf085;]  fa-columns [&#xf0db;]  fa-comment [&#xf075;]  fa-comment-o [&#xf0e5;] 4.4  fa-commenting [&#xf27a;] 4.4  fa-commenting-o [&#xf27b;]  fa-comments [&#xf086;]  fa-comments-o [&#xf0e6;]  fa-compass [&#xf14e;]  fa-compress [&#xf066;] 4.3  fa-connectdevelop [&#xf20e;] 4.4  fa-contao [&#xf26d;]  fa-copy (alias) [&#xf0c5;] 4.2  fa-copyright [&#xf1f9;] 4.4  fa-creative-commons [&#xf25e;]  fa-credit-card [&#xf09d;] 4.5  fa-credit-card-alt [&#xf283;]  fa-crop [&#xf125;]  fa-crosshairs [&#xf05b;]  fa-css3 [&#xf13c;] 4.1  fa-cube [&#xf1b2;] 4.1  fa-cubes [&#xf1b3;]  fa-cut (alias) [&#xf0c4;]  fa-cutlery [&#xf0f5;]  fa-dashboard (alias) [&#xf0e4;] 4.3  fa-dashcube [&#xf210;] 4.1  fa-database [&#xf1c0;] 4.6  fa-deaf [&#xf2a4;] 4.6  fa-deafness (alias) [&#xf2a4;]  fa-dedent (alias) [&#xf03b;] 4.1  fa-delicious [&#xf1a5;]  fa-desktop [&#xf108;] 4.1  fa-deviantart [&#xf1bd;] 4.3  fa-diamond [&#xf219;] 4.1  fa-digg [&#xf1a6;]  fa-dollar (alias) [&#xf155;] 4.0  fa-dot-circle-o [&#xf192;]  fa-download [&#xf019;]  fa-dribbble [&#xf17d;]  fa-dropbox [&#xf16b;] 4.1  fa-drupal [&#xf1a9;] 4.5  fa-edge [&#xf282;]  fa-edit (alias) [&#xf044;]  fa-eject [&#xf052;]  fa-ellipsis-h [&#xf141;]  fa-ellipsis-v [&#xf142;] 4.1  fa-empire [&#xf1d1;]  fa-envelope [&#xf0e0;]  fa-envelope-o [&#xf003;] 4.1  fa-envelope-square [&#xf199;] 4.6  fa-envira [&#xf299;]  fa-eraser [&#xf12d;]  fa-eur [&#xf153;]  fa-euro (alias) [&#xf153;]  fa-exchange [&#xf0ec;]  fa-exclamation [&#xf12a;]  fa-exclamation-circle [&#xf06a;]  fa-exclamation-triangle [&#xf071;]  fa-expand [&#xf065;] 4.4  fa-expeditedssl [&#xf23e;]  fa-external-link [&#xf08e;]  fa-external-link-square [&#xf14c;]  fa-eye [&#xf06e;]  fa-eye-slash [&#xf070;] 4.2  fa-eyedropper [&#xf1fb;] 4.6  fa-fa (alias) [&#xf2b4;]  fa-facebook [&#xf09a;]  fa-facebook-f (alias) [&#xf09a;] 4.3  fa-facebook-official [&#xf230;]  fa-facebook-square [&#xf082;]  fa-fast-backward [&#xf049;]  fa-fast-forward [&#xf050;] 4.1  fa-fax [&#xf1ac;]  fa-feed (alias) [&#xf09e;]  fa-female [&#xf182;]  fa-fighter-jet [&#xf0fb;]  fa-file [&#xf15b;] 4.1  fa-file-archive-o [&#xf1c6;] 4.1  fa-file-audio-o [&#xf1c7;] 4.1  fa-file-code-o [&#xf1c9;] 4.1  fa-file-excel-o [&#xf1c3;] 4.1  fa-file-image-o [&#xf1c5;] 4.1  fa-file-movie-o (alias) [&#xf1c8;]  fa-file-o [&#xf016;] 4.1  fa-file-pdf-o [&#xf1c1;] 4.1  fa-file-photo-o (alias) [&#xf1c5;] 4.1  fa-file-picture-o (alias) [&#xf1c5;] 4.1  fa-file-powerpoint-o [&#xf1c4;] 4.1  fa-file-sound-o (alias) [&#xf1c7;]  fa-file-text [&#xf15c;]  fa-file-text-o [&#xf0f6;] 4.1  fa-file-video-o [&#xf1c8;] 4.1  fa-file-word-o [&#xf1c2;] 4.1  fa-file-zip-o (alias) [&#xf1c6;]  fa-files-o [&#xf0c5;]  fa-film [&#xf008;]  fa-filter [&#xf0b0;]  fa-fire [&#xf06d;]  fa-fire-extinguisher [&#xf134;] 4.4  fa-firefox [&#xf269;] 4.6  fa-first-order [&#xf2b0;]  fa-flag [&#xf024;]  fa-flag-checkered [&#xf11e;]  fa-flag-o [&#xf11d;]  fa-flash (alias) [&#xf0e7;]  fa-flask [&#xf0c3;]  fa-flickr [&#xf16e;]  fa-floppy-o [&#xf0c7;]  fa-folder [&#xf07b;]  fa-folder-o [&#xf114;]  fa-folder-open [&#xf07c;]  fa-folder-open-o [&#xf115;]  fa-font [&#xf031;] 4.6  fa-font-awesome [&#xf2b4;] 4.4  fa-fonticons [&#xf280;] 4.5  fa-fort-awesome [&#xf286;] 4.3  fa-forumbee [&#xf211;]  fa-forward [&#xf04e;]  fa-foursquare [&#xf180;]  fa-frown-o [&#xf119;] 4.2  fa-futbol-o [&#xf1e3;]  fa-gamepad [&#xf11b;]  fa-gavel [&#xf0e3;]  fa-gbp [&#xf154;] 4.1  fa-ge (alias) [&#xf1d1;]  fa-gear (alias) [&#xf013;]  fa-gears (alias) [&#xf085;] 4.4  fa-genderless [&#xf22d;] 4.4  fa-get-pocket [&#xf265;] 4.4  fa-gg [&#xf260;] 4.4  fa-gg-circle [&#xf261;]  fa-gift [&#xf06b;] 4.1  fa-git [&#xf1d3;] 4.1  fa-git-square [&#xf1d2;]  fa-github [&#xf09b;]  fa-github-alt [&#xf113;]  fa-github-square [&#xf092;] 4.6  fa-gitlab [&#xf296;]  fa-gittip (alias) [&#xf184;]  fa-glass [&#xf000;] 4.6  fa-glide [&#xf2a5;] 4.6  fa-glide-g [&#xf2a6;]  fa-globe [&#xf0ac;] 4.1  fa-google [&#xf1a0;]  fa-google-plus [&#xf0d5;] 4.6  fa-google-plus-circle (alias) [&#xf2b3;] 4.6  fa-google-plus-official [&#xf2b3;]  fa-google-plus-square [&#xf0d4;] 4.2  fa-google-wallet [&#xf1ee;] 4.1  fa-graduation-cap [&#xf19d;]  fa-gratipay [&#xf184;]  fa-group (alias) [&#xf0c0;]  fa-h-square [&#xf0fd;] 4.1  fa-hacker-news [&#xf1d4;] 4.4  fa-hand-grab-o (alias) [&#xf255;] 4.4  fa-hand-lizard-o [&#xf258;]  fa-hand-o-down [&#xf0a7;]  fa-hand-o-left [&#xf0a5;]  fa-hand-o-right [&#xf0a4;]  fa-hand-o-up [&#xf0a6;] 4.4  fa-hand-paper-o [&#xf256;] 4.4  fa-hand-peace-o [&#xf25b;] 4.4  fa-hand-pointer-o [&#xf25a;] 4.4  fa-hand-rock-o [&#xf255;] 4.4  fa-hand-scissors-o [&#xf257;] 4.4  fa-hand-spock-o [&#xf259;] 4.4  fa-hand-stop-o (alias) [&#xf256;] 4.6  fa-hard-of-hearing (alias) [&#xf2a4;] 4.5  fa-hashtag [&#xf292;]  fa-hdd-o [&#xf0a0;] 4.1  fa-header [&#xf1dc;]  fa-headphones [&#xf025;]  fa-heart [&#xf004;]  fa-heart-o [&#xf08a;] 4.3  fa-heartbeat [&#xf21e;] 4.1  fa-history [&#xf1da;]  fa-home [&#xf015;]  fa-hospital-o [&#xf0f8;] 4.3  fa-hotel (alias) [&#xf236;] 4.4  fa-hourglass [&#xf254;] 4.4  fa-hourglass-1 (alias) [&#xf251;] 4.4  fa-hourglass-2 (alias) [&#xf252;] 4.4  fa-hourglass-3 (alias) [&#xf253;] 4.4  fa-hourglass-end [&#xf253;] 4.4  fa-hourglass-half [&#xf252;] 4.4  fa-hourglass-o [&#xf250;] 4.4  fa-hourglass-start [&#xf251;] 4.4  fa-houzz [&#xf27c;]  fa-html5 [&#xf13b;] 4.4  fa-i-cursor [&#xf246;] 4.2  fa-ils [&#xf20b;]  fa-image (alias) [&#xf03e;]  fa-inbox [&#xf01c;]  fa-indent [&#xf03c;] 4.4  fa-industry [&#xf275;]  fa-info [&#xf129;]  fa-info-circle [&#xf05a;]  fa-inr [&#xf156;] 4.6  fa-instagram [&#xf16d;] 4.1  fa-institution (alias) [&#xf19c;] 4.4  fa-internet-explorer [&#xf26b;] 4.3  fa-intersex (alias) [&#xf224;] 4.2  fa-ioxhost [&#xf208;]  fa-italic [&#xf033;] 4.1  fa-joomla [&#xf1aa;]  fa-jpy [&#xf157;] 4.1  fa-jsfiddle [&#xf1cc;]  fa-key [&#xf084;]  fa-keyboard-o [&#xf11c;]  fa-krw [&#xf159;] 4.1  fa-language [&#xf1ab;]  fa-laptop [&#xf109;] 4.2  fa-lastfm [&#xf202;] 4.2  fa-lastfm-square [&#xf203;]  fa-leaf [&#xf06c;] 4.3  fa-leanpub [&#xf212;]  fa-legal (alias) [&#xf0e3;]  fa-lemon-o [&#xf094;]  fa-level-down [&#xf149;]  fa-level-up [&#xf148;] 4.1  fa-life-bouy (alias) [&#xf1cd;] 4.1  fa-life-buoy (alias) [&#xf1cd;] 4.1  fa-life-ring [&#xf1cd;] 4.1  fa-life-saver (alias) [&#xf1cd;]  fa-lightbulb-o [&#xf0eb;] 4.2  fa-line-chart [&#xf201;]  fa-link [&#xf0c1;]  fa-linkedin [&#xf0e1;]  fa-linkedin-square [&#xf08c;]  fa-linux [&#xf17c;]  fa-list [&#xf03a;]  fa-list-alt [&#xf022;]  fa-list-ol [&#xf0cb;]  fa-list-ul [&#xf0ca;]  fa-location-arrow [&#xf124;]  fa-lock [&#xf023;]  fa-long-arrow-down [&#xf175;]  fa-long-arrow-left [&#xf177;]  fa-long-arrow-right [&#xf178;]  fa-long-arrow-up [&#xf176;] 4.6  fa-low-vision [&#xf2a8;]  fa-magic [&#xf0d0;]  fa-magnet [&#xf076;]  fa-mail-forward (alias) [&#xf064;]  fa-mail-reply (alias) [&#xf112;]  fa-mail-reply-all (alias) [&#xf122;]  fa-male [&#xf183;] 4.4  fa-map [&#xf279;]  fa-map-marker [&#xf041;] 4.4  fa-map-o [&#xf278;] 4.4  fa-map-pin [&#xf276;] 4.4  fa-map-signs [&#xf277;] 4.3  fa-mars [&#xf222;] 4.3  fa-mars-double [&#xf227;] 4.3  fa-mars-stroke [&#xf229;] 4.3  fa-mars-stroke-h [&#xf22b;] 4.3  fa-mars-stroke-v [&#xf22a;]  fa-maxcdn [&#xf136;] 4.2  fa-meanpath [&#xf20c;] 4.3  fa-medium [&#xf23a;]  fa-medkit [&#xf0fa;]  fa-meh-o [&#xf11a;] 4.3  fa-mercury [&#xf223;]  fa-microphone [&#xf130;]  fa-microphone-slash [&#xf131;]  fa-minus [&#xf068;]  fa-minus-circle [&#xf056;]  fa-minus-square [&#xf146;]  fa-minus-square-o [&#xf147;] 4.5  fa-mixcloud [&#xf289;]  fa-mobile [&#xf10b;]  fa-mobile-phone (alias) [&#xf10b;] 4.5  fa-modx [&#xf285;]  fa-money [&#xf0d6;]  fa-moon-o [&#xf186;] 4.1  fa-mortar-board (alias) [&#xf19d;] 4.3  fa-motorcycle [&#xf21c;] 4.4  fa-mouse-pointer [&#xf245;]  fa-music [&#xf001;]  fa-navicon (alias) [&#xf0c9;] 4.3  fa-neuter [&#xf22c;] 4.2  fa-newspaper-o [&#xf1ea;] 4.4  fa-object-group [&#xf247;] 4.4  fa-object-ungroup [&#xf248;] 4.4  fa-odnoklassniki [&#xf263;] 4.4  fa-odnoklassniki-square [&#xf264;] 4.4  fa-opencart [&#xf23d;] 4.1  fa-openid [&#xf19b;] 4.4  fa-opera [&#xf26a;] 4.4  fa-optin-monster [&#xf23c;]  fa-outdent [&#xf03b;] 4.0  fa-pagelines [&#xf18c;] 4.2  fa-paint-brush [&#xf1fc;] 4.1  fa-paper-plane [&#xf1d8;] 4.1  fa-paper-plane-o [&#xf1d9;]  fa-paperclip [&#xf0c6;] 4.1  fa-paragraph [&#xf1dd;]  fa-paste (alias) [&#xf0ea;]  fa-pause [&#xf04c;] 4.5  fa-pause-circle [&#xf28b;] 4.5  fa-pause-circle-o [&#xf28c;] 4.1  fa-paw [&#xf1b0;] 4.2  fa-paypal [&#xf1ed;]  fa-pencil [&#xf040;]  fa-pencil-square [&#xf14b;]  fa-pencil-square-o [&#xf044;] 4.5  fa-percent [&#xf295;]  fa-phone [&#xf095;]  fa-phone-square [&#xf098;]  fa-photo (alias) [&#xf03e;]  fa-picture-o [&#xf03e;] 4.2  fa-pie-chart [&#xf200;] 4.6  fa-pied-piper [&#xf2ae;] 4.1  fa-pied-piper-alt [&#xf1a8;] 4.1  fa-pied-piper-pp [&#xf1a7;]  fa-pinterest [&#xf0d2;] 4.3  fa-pinterest-p [&#xf231;]  fa-pinterest-square [&#xf0d3;]  fa-plane [&#xf072;]  fa-play [&#xf04b;]  fa-play-circle [&#xf144;]  fa-play-circle-o [&#xf01d;] 4.2  fa-plug [&#xf1e6;]  fa-plus [&#xf067;]  fa-plus-circle [&#xf055;]  fa-plus-square [&#xf0fe;] 4.0  fa-plus-square-o [&#xf196;]  fa-power-off [&#xf011;]  fa-print [&#xf02f;] 4.5  fa-product-hunt [&#xf288;]  fa-puzzle-piece [&#xf12e;] 4.1  fa-qq [&#xf1d6;]  fa-qrcode [&#xf029;]  fa-question [&#xf128;]  fa-question-circle [&#xf059;] 4.6  fa-question-circle-o [&#xf29c;]  fa-quote-left [&#xf10d;]  fa-quote-right [&#xf10e;] 4.1  fa-ra (alias) [&#xf1d0;]  fa-random [&#xf074;] 4.1  fa-rebel [&#xf1d0;] 4.1  fa-recycle [&#xf1b8;] 4.1  fa-reddit [&#xf1a1;] 4.5  fa-reddit-alien [&#xf281;] 4.1  fa-reddit-square [&#xf1a2;]  fa-refresh [&#xf021;] 4.4  fa-registered [&#xf25d;]  fa-remove (alias) [&#xf00d;]  fa-renren [&#xf18b;]  fa-reorder (alias) [&#xf0c9;]  fa-repeat [&#xf01e;]  fa-reply [&#xf112;]  fa-reply-all [&#xf122;] 4.1  fa-resistance (alias) [&#xf1d0;]  fa-retweet [&#xf079;]  fa-rmb (alias) [&#xf157;]  fa-road [&#xf018;]  fa-rocket [&#xf135;]  fa-rotate-left (alias) [&#xf0e2;]  fa-rotate-right (alias) [&#xf01e;] 4.0  fa-rouble (alias) [&#xf158;]  fa-rss [&#xf09e;]  fa-rss-square [&#xf143;] 4.0  fa-rub [&#xf158;] 4.0  fa-ruble (alias) [&#xf158;]  fa-rupee (alias) [&#xf156;] 4.4  fa-safari [&#xf267;]  fa-save (alias) [&#xf0c7;]  fa-scissors [&#xf0c4;] 4.5  fa-scribd [&#xf28a;]  fa-search [&#xf002;]  fa-search-minus [&#xf010;]  fa-search-plus [&#xf00e;] 4.3  fa-sellsy [&#xf213;] 4.1  fa-send (alias) [&#xf1d8;] 4.1  fa-send-o (alias) [&#xf1d9;] 4.3  fa-server [&#xf233;]  fa-share [&#xf064;] 4.1  fa-share-alt [&#xf1e0;] 4.1  fa-share-alt-square [&#xf1e1;]  fa-share-square [&#xf14d;]  fa-share-square-o [&#xf045;] 4.2  fa-shekel (alias) [&#xf20b;] 4.2  fa-sheqel (alias) [&#xf20b;]  fa-shield [&#xf132;] 4.3  fa-ship [&#xf21a;] 4.3  fa-shirtsinbulk [&#xf214;] 4.5  fa-shopping-bag [&#xf290;] 4.5  fa-shopping-basket [&#xf291;]  fa-shopping-cart [&#xf07a;]  fa-sign-in [&#xf090;] 4.6  fa-sign-language [&#xf2a7;]  fa-sign-out [&#xf08b;]  fa-signal [&#xf012;] 4.6  fa-signing (alias) [&#xf2a7;] 4.3  fa-simplybuilt [&#xf215;]  fa-sitemap [&#xf0e8;] 4.3  fa-skyatlas [&#xf216;]  fa-skype [&#xf17e;] 4.1  fa-slack [&#xf198;] 4.1  fa-sliders [&#xf1de;] 4.2  fa-slideshare [&#xf1e7;]  fa-smile-o [&#xf118;] 4.6  fa-snapchat [&#xf2ab;] 4.6  fa-snapchat-ghost [&#xf2ac;] 4.6  fa-snapchat-square [&#xf2ad;] 4.2  fa-soccer-ball-o (alias) [&#xf1e3;]  fa-sort [&#xf0dc;]  fa-sort-alpha-asc [&#xf15d;]  fa-sort-alpha-desc [&#xf15e;]  fa-sort-amount-asc [&#xf160;]  fa-sort-amount-desc [&#xf161;]  fa-sort-asc [&#xf0de;]  fa-sort-desc [&#xf0dd;]  fa-sort-down (alias) [&#xf0dd;]  fa-sort-numeric-asc [&#xf162;]  fa-sort-numeric-desc [&#xf163;]  fa-sort-up (alias) [&#xf0de;] 4.1  fa-soundcloud [&#xf1be;] 4.1  fa-space-shuttle [&#xf197;]  fa-spinner [&#xf110;] 4.1  fa-spoon [&#xf1b1;] 4.1  fa-spotify [&#xf1bc;]  fa-square [&#xf0c8;]  fa-square-o [&#xf096;] 4.0  fa-stack-exchange [&#xf18d;]  fa-stack-overflow [&#xf16c;]  fa-star [&#xf005;]  fa-star-half [&#xf089;]  fa-star-half-empty (alias) [&#xf123;]  fa-star-half-full (alias) [&#xf123;]  fa-star-half-o [&#xf123;]  fa-star-o [&#xf006;] 4.1  fa-steam [&#xf1b6;] 4.1  fa-steam-square [&#xf1b7;]  fa-step-backward [&#xf048;]  fa-step-forward [&#xf051;]  fa-stethoscope [&#xf0f1;] 4.4  fa-sticky-note [&#xf249;] 4.4  fa-sticky-note-o [&#xf24a;]  fa-stop [&#xf04d;] 4.5  fa-stop-circle [&#xf28d;] 4.5  fa-stop-circle-o [&#xf28e;] 4.3  fa-street-view [&#xf21d;]  fa-strikethrough [&#xf0cc;] 4.1  fa-stumbleupon [&#xf1a4;] 4.1  fa-stumbleupon-circle [&#xf1a3;]  fa-subscript [&#xf12c;] 4.3  fa-subway [&#xf239;]  fa-suitcase [&#xf0f2;]  fa-sun-o [&#xf185;]  fa-superscript [&#xf12b;] 4.1  fa-support (alias) [&#xf1cd;]  fa-table [&#xf0ce;]  fa-tablet [&#xf10a;]  fa-tachometer [&#xf0e4;]  fa-tag [&#xf02b;]  fa-tags [&#xf02c;]  fa-tasks [&#xf0ae;] 4.1  fa-taxi [&#xf1ba;] 4.4  fa-television [&#xf26c;] 4.1  fa-tencent-weibo [&#xf1d5;]  fa-terminal [&#xf120;]  fa-text-height [&#xf034;]  fa-text-width [&#xf035;]  fa-th [&#xf00a;]  fa-th-large [&#xf009;]  fa-th-list [&#xf00b;] 4.6  fa-themeisle [&#xf2b2;]  fa-thumb-tack [&#xf08d;]  fa-thumbs-down [&#xf165;]  fa-thumbs-o-down [&#xf088;]  fa-thumbs-o-up [&#xf087;]  fa-thumbs-up [&#xf164;]  fa-ticket [&#xf145;]  fa-times [&#xf00d;]  fa-times-circle [&#xf057;]  fa-times-circle-o [&#xf05c;]  fa-tint [&#xf043;]  fa-toggle-down (alias) [&#xf150;] 4.0  fa-toggle-left (alias) [&#xf191;] 4.2  fa-toggle-off [&#xf204;] 4.2  fa-toggle-on [&#xf205;]  fa-toggle-right (alias) [&#xf152;]  fa-toggle-up (alias) [&#xf151;] 4.4  fa-trademark [&#xf25c;] 4.3  fa-train [&#xf238;] 4.3  fa-transgender [&#xf224;] 4.3  fa-transgender-alt [&#xf225;] 4.2  fa-trash [&#xf1f8;]  fa-trash-o [&#xf014;] 4.1  fa-tree [&#xf1bb;]  fa-trello [&#xf181;] 4.4  fa-tripadvisor [&#xf262;]  fa-trophy [&#xf091;]  fa-truck [&#xf0d1;] 4.0  fa-try [&#xf195;] 4.2  fa-tty [&#xf1e4;]  fa-tumblr [&#xf173;]  fa-tumblr-square [&#xf174;] 4.0  fa-turkish-lira (alias) [&#xf195;] 4.4  fa-tv (alias) [&#xf26c;] 4.2  fa-twitch [&#xf1e8;]  fa-twitter [&#xf099;]  fa-twitter-square [&#xf081;]  fa-umbrella [&#xf0e9;]  fa-underline [&#xf0cd;]  fa-undo [&#xf0e2;] 4.6  fa-universal-access [&#xf29a;] 4.1  fa-university [&#xf19c;]  fa-unlink (alias) [&#xf127;]  fa-unlock [&#xf09c;]  fa-unlock-alt [&#xf13e;]  fa-unsorted (alias) [&#xf0dc;]  fa-upload [&#xf093;] 4.5  fa-usb [&#xf287;]  fa-usd [&#xf155;]  fa-user [&#xf007;]  fa-user-md [&#xf0f0;] 4.3  fa-user-plus [&#xf234;] 4.3  fa-user-secret [&#xf21b;] 4.3  fa-user-times [&#xf235;]  fa-users [&#xf0c0;] 4.3  fa-venus [&#xf221;] 4.3  fa-venus-double [&#xf226;] 4.3  fa-venus-mars [&#xf228;] 4.3  fa-viacoin [&#xf237;] 4.6  fa-viadeo [&#xf2a9;] 4.6  fa-viadeo-square [&#xf2aa;]  fa-video-camera [&#xf03d;] 4.4  fa-vimeo [&#xf27d;] 4.0  fa-vimeo-square [&#xf194;] 4.1  fa-vine [&#xf1ca;]  fa-vk [&#xf189;] 4.6  fa-volume-control-phone [&#xf2a0;]  fa-volume-down [&#xf027;]  fa-volume-off [&#xf026;]  fa-volume-up [&#xf028;]  fa-warning (alias) [&#xf071;] 4.1  fa-wechat (alias) [&#xf1d7;]  fa-weibo [&#xf18a;] 4.1  fa-weixin [&#xf1d7;] 4.3  fa-whatsapp [&#xf232;] 4.0  fa-wheelchair [&#xf193;] 4.6  fa-wheelchair-alt [&#xf29b;] 4.2  fa-wifi [&#xf1eb;] 4.4  fa-wikipedia-w [&#xf266;]  fa-windows [&#xf17a;]  fa-won (alias) [&#xf159;] 4.1  fa-wordpress [&#xf19a;] 4.6  fa-wpbeginner [&#xf297;] 4.6  fa-wpforms [&#xf298;]  fa-wrench [&#xf0ad;]  fa-xing [&#xf168;]  fa-xing-square [&#xf169;] 4.4  fa-y-combinator [&#xf23b;] 4.1  fa-y-combinator-square (alias) [&#xf1d4;] 4.1  fa-yahoo [&#xf19e;] 4.4  fa-yc (alias) [&#xf23b;] 4.1  fa-yc-square (alias) [&#xf1d4;] 4.2  fa-yelp [&#xf1e9;]  fa-yen (alias) [&#xf157;] 4.6  fa-yoast [&#xf2b1;]  fa-youtube [&#xf167;]  fa-youtube-play [&#xf16a;]  fa-youtube-square [&#xf166;] '; $subst = "\2\t\3\t\1\n"; $result = preg_replace($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