This is a php array of all the icons found in Font Awesome 4.0.3

Font Awesome 4 icons

<?php

$icon[] = 'fa-glass';
$icon[] = 'fa-music';
$icon[] = 'fa-search';
$icon[] = 'fa-envelope-o';
$icon[] = 'fa-heart';
$icon[] = 'fa-star';
$icon[] = 'fa-star-o';
$icon[] = 'fa-user';
$icon[] = 'fa-film';
$icon[] = 'fa-th-large';
$icon[] = 'fa-th';
$icon[] = 'fa-th-list';
$icon[] = 'fa-check';
$icon[] = 'fa-times';
$icon[] = 'fa-search-plus';
$icon[] = 'fa-search-minus';
$icon[] = 'fa-power-off';
$icon[] = 'fa-signal';
$icon[] = 'fa-cog';
$icon[] = 'fa-trash-o';
$icon[] = 'fa-home';
$icon[] = 'fa-file-o';
$icon[] = 'fa-clock-o';
$icon[] = 'fa-road';
$icon[] = 'fa-download';
$icon[] = 'fa-arrow-circle-o-down';
$icon[] = 'fa-arrow-circle-o-up';
$icon[] = 'fa-inbox';
$icon[] = 'fa-play-circle-o';
$icon[] = 'fa-repeat';
$icon[] = 'fa-refresh';
$icon[] = 'fa-list-alt';
$icon[] = 'fa-lock';
$icon[] = 'fa-flag';
$icon[] = 'fa-headphones';
$icon[] = 'fa-volume-off';
$icon[] = 'fa-volume-down';
$icon[] = 'fa-volume-up';
$icon[] = 'fa-qrcode';
$icon[] = 'fa-barcode';
$icon[] = 'fa-tag';
$icon[] = 'fa-tags';
$icon[] = 'fa-book';
$icon[] = 'fa-bookmark';
$icon[] = 'fa-print';
$icon[] = 'fa-camera';
$icon[] = 'fa-font';
$icon[] = 'fa-bold';
$icon[] = 'fa-italic';
$icon[] = 'fa-text-height';
$icon[] = 'fa-text-width';
$icon[] = 'fa-align-left';
$icon[] = 'fa-align-center';
$icon[] = 'fa-align-right';
$icon[] = 'fa-align-justify';
$icon[] = 'fa-list';
$icon[] = 'fa-outdent';
$icon[] = 'fa-indent';
$icon[] = 'fa-video-camera';
$icon[] = 'fa-picture-o';
$icon[] = 'fa-pencil';
$icon[] = 'fa-map-marker';
$icon[] = 'fa-adjust';
$icon[] = 'fa-tint';
$icon[] = 'fa-pencil-square-o';
$icon[] = 'fa-share-square-o';
$icon[] = 'fa-check-square-o';
$icon[] = 'fa-arrows';
$icon[] = 'fa-step-backward';
$icon[] = 'fa-fast-backward';
$icon[] = 'fa-backward';
$icon[] = 'fa-play';
$icon[] = 'fa-pause';
$icon[] = 'fa-stop';
$icon[] = 'fa-forward';
$icon[] = 'fa-fast-forward';
$icon[] = 'fa-step-forward';
$icon[] = 'fa-eject';
$icon[] = 'fa-chevron-left';
$icon[] = 'fa-chevron-right';
$icon[] = 'fa-plus-circle';
$icon[] = 'fa-minus-circle';
$icon[] = 'fa-times-circle';
$icon[] = 'fa-check-circle';
$icon[] = 'fa-question-circle';
$icon[] = 'fa-info-circle';
$icon[] = 'fa-crosshairs';
$icon[] = 'fa-times-circle-o';
$icon[] = 'fa-check-circle-o';
$icon[] = 'fa-ban';
$icon[] = 'fa-arrow-left';
$icon[] = 'fa-arrow-right';
$icon[] = 'fa-arrow-up';
$icon[] = 'fa-arrow-down';
$icon[] = 'fa-share';
$icon[] = 'fa-expand';
$icon[] = 'fa-compress';
$icon[] = 'fa-plus';
$icon[] = 'fa-minus';
$icon[] = 'fa-asterisk';
$icon[] = 'fa-exclamation-circle';
$icon[] = 'fa-gift';
$icon[] = 'fa-leaf';
$icon[] = 'fa-fire';
$icon[] = 'fa-eye';
$icon[] = 'fa-eye-slash';
$icon[] = 'fa-exclamation-triangle';
$icon[] = 'fa-plane';
$icon[] = 'fa-calendar';
$icon[] = 'fa-random';
$icon[] = 'fa-comment';
$icon[] = 'fa-magnet';
$icon[] = 'fa-chevron-up';
$icon[] = 'fa-chevron-down';
$icon[] = 'fa-retweet';
$icon[] = 'fa-shopping-cart';
$icon[] = 'fa-folder';
$icon[] = 'fa-folder-open';
$icon[] = 'fa-arrows-v';
$icon[] = 'fa-arrows-h';
$icon[] = 'fa-bar-chart-o';
$icon[] = 'fa-twitter-square';
$icon[] = 'fa-facebook-square';
$icon[] = 'fa-camera-retro';
$icon[] = 'fa-key';
$icon[] = 'fa-cogs';
$icon[] = 'fa-comments';
$icon[] = 'fa-thumbs-o-up';
$icon[] = 'fa-thumbs-o-down';
$icon[] = 'fa-star-half';
$icon[] = 'fa-heart-o';
$icon[] = 'fa-sign-out';
$icon[] = 'fa-linkedin-square';
$icon[] = 'fa-thumb-tack';
$icon[] = 'fa-external-link';
$icon[] = 'fa-sign-in';
$icon[] = 'fa-trophy';
$icon[] = 'fa-github-square';
$icon[] = 'fa-upload';
$icon[] = 'fa-lemon-o';
$icon[] = 'fa-phone';
$icon[] = 'fa-square-o';
$icon[] = 'fa-bookmark-o';
$icon[] = 'fa-phone-square';
$icon[] = 'fa-twitter';
$icon[] = 'fa-facebook';
$icon[] = 'fa-github';
$icon[] = 'fa-unlock';
$icon[] = 'fa-credit-card';
$icon[] = 'fa-rss';
$icon[] = 'fa-hdd-o';
$icon[] = 'fa-bullhorn';
$icon[] = 'fa-bell';
$icon[] = 'fa-certificate';
$icon[] = 'fa-hand-o-right';
$icon[] = 'fa-hand-o-left';
$icon[] = 'fa-hand-o-up';
$icon[] = 'fa-hand-o-down';
$icon[] = 'fa-arrow-circle-left';
$icon[] = 'fa-arrow-circle-right';
$icon[] = 'fa-arrow-circle-up';
$icon[] = 'fa-arrow-circle-down';
$icon[] = 'fa-globe';
$icon[] = 'fa-wrench';
$icon[] = 'fa-tasks';
$icon[] = 'fa-filter';
$icon[] = 'fa-briefcase';
$icon[] = 'fa-arrows-alt';
$icon[] = 'fa-users';
$icon[] = 'fa-link';
$icon[] = 'fa-cloud';
$icon[] = 'fa-flask';
$icon[] = 'fa-scissors';
$icon[] = 'fa-files-o';
$icon[] = 'fa-paperclip';
$icon[] = 'fa-floppy-o';
$icon[] = 'fa-square';
$icon[] = 'fa-bars';
$icon[] = 'fa-list-ul';
$icon[] = 'fa-list-ol';
$icon[] = 'fa-strikethrough';
$icon[] = 'fa-underline';
$icon[] = 'fa-table';
$icon[] = 'fa-magic';
$icon[] = 'fa-truck';
$icon[] = 'fa-pinterest';
$icon[] = 'fa-pinterest-square';
$icon[] = 'fa-google-plus-square';
$icon[] = 'fa-google-plus';
$icon[] = 'fa-money';
$icon[] = 'fa-caret-down';
$icon[] = 'fa-caret-up';
$icon[] = 'fa-caret-left';
$icon[] = 'fa-caret-right';
$icon[] = 'fa-columns';
$icon[] = 'fa-sort';
$icon[] = 'fa-sort-asc';
$icon[] = 'fa-sort-desc';
$icon[] = 'fa-envelope';
$icon[] = 'fa-linkedin';
$icon[] = 'fa-undo';
$icon[] = 'fa-gavel';
$icon[] = 'fa-tachometer';
$icon[] = 'fa-comment-o';
$icon[] = 'fa-comments-o';
$icon[] = 'fa-bolt';
$icon[] = 'fa-sitemap';
$icon[] = 'fa-umbrella';
$icon[] = 'fa-clipboard';
$icon[] = 'fa-lightbulb-o';
$icon[] = 'fa-exchange';
$icon[] = 'fa-cloud-download';
$icon[] = 'fa-cloud-upload';
$icon[] = 'fa-user-md';
$icon[] = 'fa-stethoscope';
$icon[] = 'fa-suitcase';
$icon[] = 'fa-bell-o';
$icon[] = 'fa-coffee';
$icon[] = 'fa-cutlery';
$icon[] = 'fa-file-text-o';
$icon[] = 'fa-building-o';
$icon[] = 'fa-hospital-o';
$icon[] = 'fa-ambulance';
$icon[] = 'fa-medkit';
$icon[] = 'fa-fighter-jet';
$icon[] = 'fa-beer';
$icon[] = 'fa-h-square';
$icon[] = 'fa-plus-square';
$icon[] = 'fa-angle-double-left';
$icon[] = 'fa-angle-double-right';
$icon[] = 'fa-angle-double-up';
$icon[] = 'fa-angle-double-down';
$icon[] = 'fa-angle-left';
$icon[] = 'fa-angle-right';
$icon[] = 'fa-angle-up';
$icon[] = 'fa-angle-down';
$icon[] = 'fa-desktop';
$icon[] = 'fa-laptop';
$icon[] = 'fa-tablet';
$icon[] = 'fa-mobile';
$icon[] = 'fa-circle-o';
$icon[] = 'fa-quote-left';
$icon[] = 'fa-quote-right';
$icon[] = 'fa-spinner';
$icon[] = 'fa-circle';
$icon[] = 'fa-reply';
$icon[] = 'fa-github-alt';
$icon[] = 'fa-folder-o';
$icon[] = 'fa-folder-open-o';
$icon[] = 'fa-smile-o';
$icon[] = 'fa-frown-o';
$icon[] = 'fa-meh-o';
$icon[] = 'fa-gamepad';
$icon[] = 'fa-keyboard-o';
$icon[] = 'fa-flag-o';
$icon[] = 'fa-flag-checkered';
$icon[] = 'fa-terminal';
$icon[] = 'fa-code';
$icon[] = 'fa-reply-all';
$icon[] = 'fa-mail-reply-all';
$icon[] = 'fa-star-half-o';
$icon[] = 'fa-location-arrow';
$icon[] = 'fa-crop';
$icon[] = 'fa-code-fork';
$icon[] = 'fa-chain-broken';
$icon[] = 'fa-question';
$icon[] = 'fa-info';
$icon[] = 'fa-exclamation';
$icon[] = 'fa-superscript';
$icon[] = 'fa-subscript';
$icon[] = 'fa-eraser';
$icon[] = 'fa-puzzle-piece';
$icon[] = 'fa-microphone';
$icon[] = 'fa-microphone-slash';
$icon[] = 'fa-shield';
$icon[] = 'fa-calendar-o';
$icon[] = 'fa-fire-extinguisher';
$icon[] = 'fa-rocket';
$icon[] = 'fa-maxcdn';
$icon[] = 'fa-chevron-circle-left';
$icon[] = 'fa-chevron-circle-right';
$icon[] = 'fa-chevron-circle-up';
$icon[] = 'fa-chevron-circle-down';
$icon[] = 'fa-html5';
$icon[] = 'fa-css3';
$icon[] = 'fa-anchor';
$icon[] = 'fa-unlock-alt';
$icon[] = 'fa-bullseye';
$icon[] = 'fa-ellipsis-h';
$icon[] = 'fa-ellipsis-v';
$icon[] = 'fa-rss-square';
$icon[] = 'fa-play-circle';
$icon[] = 'fa-ticket';
$icon[] = 'fa-minus-square';
$icon[] = 'fa-minus-square-o';
$icon[] = 'fa-level-up';
$icon[] = 'fa-level-down';
$icon[] = 'fa-check-square';
$icon[] = 'fa-pencil-square';
$icon[] = 'fa-external-link-square';
$icon[] = 'fa-share-square';
$icon[] = 'fa-compass';
$icon[] = 'fa-caret-square-o-down';
$icon[] = 'fa-caret-square-o-up';
$icon[] = 'fa-caret-square-o-right';
$icon[] = 'fa-eur';
$icon[] = 'fa-gbp';
$icon[] = 'fa-usd';
$icon[] = 'fa-inr';
$icon[] = 'fa-jpy';
$icon[] = 'fa-rub';
$icon[] = 'fa-krw';
$icon[] = 'fa-btc';
$icon[] = 'fa-file';
$icon[] = 'fa-file-text';
$icon[] = 'fa-sort-alpha-asc';
$icon[] = 'fa-sort-alpha-desc';
$icon[] = 'fa-sort-amount-asc';
$icon[] = 'fa-sort-amount-desc';
$icon[] = 'fa-sort-numeric-asc';
$icon[] = 'fa-sort-numeric-desc';
$icon[] = 'fa-thumbs-up';
$icon[] = 'fa-thumbs-down';
$icon[] = 'fa-youtube-square';
$icon[] = 'fa-youtube';
$icon[] = 'fa-xing';
$icon[] = 'fa-xing-square';
$icon[] = 'fa-youtube-play';
$icon[] = 'fa-dropbox';
$icon[] = 'fa-stack-overflow';
$icon[] = 'fa-instagram';
$icon[] = 'fa-flickr';
$icon[] = 'fa-adn';
$icon[] = 'fa-bitbucket';
$icon[] = 'fa-bitbucket-square';
$icon[] = 'fa-tumblr';
$icon[] = 'fa-tumblr-square';
$icon[] = 'fa-long-arrow-down';
$icon[] = 'fa-long-arrow-up';
$icon[] = 'fa-long-arrow-left';
$icon[] = 'fa-long-arrow-right';
$icon[] = 'fa-apple';
$icon[] = 'fa-windows';
$icon[] = 'fa-android';
$icon[] = 'fa-linux';
$icon[] = 'fa-dribbble';
$icon[] = 'fa-skype';
$icon[] = 'fa-foursquare';
$icon[] = 'fa-trello';
$icon[] = 'fa-female';
$icon[] = 'fa-male';
$icon[] = 'fa-gittip';
$icon[] = 'fa-sun-o';
$icon[] = 'fa-moon-o';
$icon[] = 'fa-archive';
$icon[] = 'fa-bug';
$icon[] = 'fa-vk';
$icon[] = 'fa-weibo';
$icon[] = 'fa-renren';
$icon[] = 'fa-pagelines';
$icon[] = 'fa-stack-exchange';
$icon[] = 'fa-arrow-circle-o-right';
$icon[] = 'fa-arrow-circle-o-left';
$icon[] = 'fa-caret-square-o-left';
$icon[] = 'fa-dot-circle-o';
$icon[] = 'fa-wheelchair';
$icon[] = 'fa-vimeo-square';
$icon[] = 'fa-try';
$icon[] = 'fa-plus-square-o';