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<?php $embedCode = "<iframe width='800' height='600'> </iframe>"; echo preg_replace('~(<iframe[^>]*\swidth=["\']?)(\d+)(["\']?\s?.*)~', '${1}' . '666' . '${3}', $embedCode); echo preg_replace('~(<iframe[^>]*\sheight=["\']?)(\d+)(["\']?\s?.*)~', '${1}' . '666' . '${3}', $embedCode);
Output for git.master, git.master_jit, rfc.property-hooks
<iframe width='666' height='600'> </iframe><iframe width='800' height='666'> </iframe>

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