소스: Using Regular Expressions with PHP
Regular Expression | Will match… |
foo | The string “foo” |
^foo | “foo” at the start of a string |
foo$ | “foo” at the end of a string |
^foo$ | “foo” when it is alone on a string |
[abc] | a, b, or c |
[a-z] | Any lowercase letter |
[^A-Z] | Any character that is not a uppercase letter |
(gif|jpg) | Matches either “gif” or “jpeg” |
[a-z]+ | One or more lowercase letters |
[0-9\.\-] | Аny number, dot, or minus sign |
^[a-zA-Z0-9_]{1,}$ | Any word of at least one letter, number or _ |
([wx])([yz]) | wy, wz, xy, or xz |
[^A-Za-z0-9] | Any symbol (not a number or a letter) |
([A-Z]{3}|[0-9]{4}) | Matches three letters or four numbers |