Quoting and a bit paraphrasing "Mastering Regular Expressions 2nd Edition":
A match mode can change the meaning of "$" to match before any embedde
+d newline (or Unicode line terminator as well). When supported, "\Z"
+usually matches what the "unmoded" "$" matches, which often means to
+match at the end of the string, or before a string-ending newline. To
+ complement these, "\z" matches only at the end of the string, period
+, without regard to any newline.
//s stands for Single Line Mode which makes the dot match any characte
//m stands for Multi Line Mode which changes how ^& $ are considered b
+y the regex engine. ^ is then begin of 1 line out of the many lines i
+n the string and not begin of string and $ is end of 1 line out of th
+e many lines in the string and not end of string.
Caret "^" matches at the beginning of the text being searched, and, if
+ in an enhanced line-anchor match mode after any newline.
\A always matches only at the start of the text being searched, regard
+less of single or multi line match mode.
"\Z" matches what the "unmoded" "$" matches, which means to match at t
+he end of the string, or before a string-ending newline. To complemen
+t these, "\z" matches only at the end of the string, period, without
+regard to any newline.
With thanks to Jeffrey Friedl's Regex Holy Book! ;-)
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||