运用PHP进行简单正则替换

code name="hello1" version="2012"

code name="123" version="2012"

code name="代码" version="2012"

code name="20121226-001" version="2012"

code name="20121226-002" version="2012"

code name="20121226-003" version="2012"

$s=<<
codes name="name1"

code name="hello1" version="2012"

code name="123" version="2012"

code name="代码" version="2012"

HTML;

$i=0;

echo preg_replace('/"(.+)"(?=\s+version)/em','"\""."20121226-00".++$i."\""',$s);