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<?php $input = <<<HTML <tr> Fried rice with chicken, beef, prawn or vegetable. </tr> <tr> <span class="number">78. </span>KHAO PHAD SABPAROD <span class="price">£9.95</span> </tr> HTML; echo preg_replace('#<tr>((?:(?!</tr>).|[\r\n])*<span[^>]*>(?:.|[\r\n])*?)</tr>#s', '<dt>$1</dt>', $input);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
<tr> Fried rice with chicken, beef, prawn or vegetable. </tr> <dt> <span class="number">78. </span>KHAO PHAD SABPAROD <span class="price">£9.95</span> </dt>

preferences:
256.3 ms | 406 KiB | 452 Q