正则匹配手机号后四位至少有一个是8？如何写？
我有一串手机号：'13141078884 13161143334 13263362224 18511925554 18612623450 13141102288 13161146662 13263370884 18513608884 18612625555 13141108580 13161146667 13263389994 13264459992 18600004038 18612932226'，相匹配出后四位至少有一个是8的手机号，正则该怎么写？
不要穷举。如(8\d{3}|\d8\d\d|\d\d8\d|\d{3}8\d)。
零宽断言能写吗
php代码：
$str = '13141078884 13161143334 13263362224 18511925554 18612623450 13141102288 13161146662 13263370884 18513608884 18612625555 13141108580 13161146667 13263389994 13264459992 18600004038 18612932226';
// 匹配手机号后四位至少有一个是8
preg_match_all('/????????/', $str, $res);
var_dump($res);
Amakura
10 years ago
Answers
(?=(.?){3}8)(\d{4})
(?=\d*8)(\d{4})
(?![^8]{4})(\d{4}) // 受@chouchang折叠答案的启发
PHP测试可以匹配
$str = '13141078884 13161143334 13263362224 18511925554 18612623450 13141102288 13161146662 13263370884 18513608884 18612625555 13141108580 13161146667 13263389994 13264459992 18600004038 18612932226';
// 匹配手机号后四位至少有一个是8
preg_match_all('/\d{7}(?=(.?){3}8)(\d{4})/', $str, $res);
var_dump($res);
bbbbf
answered 10 years ago
