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<?php $text = 'a container_ids="4" resp. container_ids="777"'; $nahrada = preg_replace_callback('~(container_ids=")(\d+)(")~', function ($matches) { return $matches[1] . ($matches[2] + 10) . $matches[3]; }, $text); var_dump($nahrada);
Output for git.master, git.master_jit, rfc.property-hooks
string(46) "a container_ids="14" resp. container_ids="787""

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