PHP正则表达式失败，在Regex 101上取得成功

Question

被这一个O_o ......

困扰

if(preg_match("(\d{1,2})\:(\d{2})", "5:00", $matches) == 1) echo "works";
else echo "don't work";

将回显

don't work

但是Regex 101上的正则表达式似乎运行正常：http://regex101.com/r/mW1dN9

我需要全球旗帜吗？

Answer 1

你的正则表达式需要一些分隔符。

if(preg_match("#(\d{1,2})\:(\d{2})#", "5:00", $matches) == 1) echo "works";
else echo "don't work";

Answer 2

您需要将正则表达式放在分隔符中：

if(preg_match("/(\d{1,2}):(\d{2})/", "5:00", $matches) == 1) echo "works";
else echo "don't work";

此外，您无需转义:，但无论如何都可以。