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<?php $text = "@keyframes animationName1{0%{opacity: 0}100%{opacity:1}}div{opacity:0}@keyframes animationName2{0%{opacity: 0}100%{opacity:1}}"; $rx = '~([^{}]+)({(?:[^{}]++|(\g<2>))*})~'; if (preg_match_all($rx, $text, $m)) { print_r($m[0]); }
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => @keyframes animationName1{0%{opacity: 0}100%{opacity:1}} [1] => div{opacity:0} [2] => @keyframes animationName2{0%{opacity: 0}100%{opacity:1}} )

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