Pattern Modifiers
Pattern Modifiers
The current possible PCRE modifiers are listed below. The names in parentheses refer to internal PCRE names for these modifiers. Spaces and newlines are ignored in modifiers, other characters cause error.
- i (PCRE_CASELESS)
- If this modifier is set, letters in the pattern match both upper and lower case letters.
- m (PCRE_MULTILINE)
- By default, PCRE treats the subject string as consisting of a single "line" of characters (even if it actually contains several newlines). The "start of line" metacharacter (^) matches only at the start of the string, while the "end of line" metacharacter ($) matches only at the end of the string, or before a terminating newline (unless D modifier is set). This is the same as Pe