求一正规则表达式

Question

源文件当中包括若干个类似document.write(AmountTimeDiff('2009,10,05,09,00,00', 4))字符串
我想用正规则表达式提取出'2009,10,05,09,00,00'
并且格式化成2009-10-05 09:00
请问各位大侠如何做?多谢

Answer 1

<?php
$str = "document.write(AmountTimeDiff('2009,10,05,09,00,00', 4))";
$pattern = "/\d{4},(\d\d,){4}\d\d/";
preg_match_all($pattern,$str,$out);
$num_str = $out[0][0];
$time_str = preg_replace("/^(\d{4}),(\d{2}),(\d{2}),(\d{2}),(\d{2}),(\d{2})$/","\$1-\$2-\$3&nbsp;\$4:\$5:\$6",$num_str);
echo $time_str;
?>