Using Regular Expressions with PHP

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