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<?php $reg = '#<p>\s*\[spoiler\s+id=\d+\]\s*</p>#'; $text = <<<TEXT Before. <p> [spoiler id=7] </p> After. <p> [spoiler id=42] </p> TEXT; echo preg_replace($reg, '', $text);
Output for git.master, git.master_jit, rfc.property-hooks
Before. After.

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