正则

Question

$pi = "/(\w{4})(\d{3})-(\d{4})(\w{2})(\d{1}?)-(2)/x";$phones ="Call555-1212or1-800-555-1212";echo preg_match($pi,$phones)? "1": "2";这样他就不行$pi = "/(\w{4})(\d{3})-(\d{4})(\w{2})(\d{1}?)-/x";$phones ="Call555-1212or1-800-555-1212";echo preg_match($pi,$phones)? "1": "2";这样就行！神马回事啊正则

Answer 1

$pi = "/(\w{4})(\d{3})-(\d{4})(\w{2})(\d{1}?)-/x";
匹配到的是
Array
(
    [0] => Call555-1212or1-
    [1] => Call
    [2] => 555
    [3] => 1212
    [4] => or
    [5] => 1
)如果加上 (2)
则需要 $phones ="Call555-1212or1-800-555-1212"; 中套红的位置为 2 才能匹配成功

Answer 2

$pi = "/(\w{4})(?<name1>\d{3})-(\d{4})(\w{2})(\d{1}?)-(\k<name1>)/x";
请问这样写对吗？