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<?php $text = '[_wc_acof_6] i want to convert'; $replacements = ['6' => 'NEW_VALUE_FOR_6_KEY']; echo preg_replace_callback('~\[_wc_acof_(\d+)]~', function($m) use ($replacements){ return $replacements[$m[1]]; }, $text);
Output for git.master, git.master_jit, rfc.property-hooks
NEW_VALUE_FOR_6_KEY i want to convert

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