package main
import (
"regexp"
"fmt"
)
func main() {
var re = regexp.MustCompile(`(?mi)^((^\+44)|^(4{2})|(^0{2}4{2})|(^0)|)([123789])\d{8,9}$`)
var str = `+44123456789
+441234567890
+44123456789
+441234567890
+447921040642
+441234567890
+44123456789
+44123456789
+441234567890
+44123456789
441234567890
44123456789
441234567890
447921040642
441234567890
44123456789
44123456789
441234567890
07921040642
0123456789
01234567890
0123456789
01234567890
01932867083
00441234567
0845121212
0044123456789
00441234567890
0123456789
01234567890
0123456789
01234567890
01932867083
00441234567
0044123456789
00441234567890
0044123456789
00441234567890
08006444454
4451925858
01420383091
112222222
111111111`
for i, match := range re.FindAllString(str, -1) {
fmt.Println(match, "found at index", i)
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Golang, please visit: https://golang.org/pkg/regexp/