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10 lines
269 B
PHP
10 lines
269 B
PHP
<?php
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$str = '<hTmL><bOdY style="background: white;">Hello, world!</bOdY></html>';
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$str = preg_replace_callback(
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'{(?<btag></?)(?<content>\w+)(?<etag>.*?>)}s',
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fn($m) => $m['btag'].strtoupper($m['content']).$m['etag'],
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$str);
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echo htmlspecialchars($str);
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