Programming languages, such as Python, treat a backslash (\) as an escape character. For instance,\nrepresents a line feed, and\trepresents a tab. When specifying a path, a forward slash (/) can be used in place
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If the backslash is followed by a special sequence recognized by the parser, the whole escape sequence is replaced by a corresponding special character (for example, ‘\n’ is replaced by a newline character when processed by the parser). This behavior causes a problem when working with regula...
My problem was not double-escaping backslash characters:<?php// Input test$input = "\"something\",\"something here\",\"some\nnew\nlines\",\"this is the end\"";// Work with online regexp testers, doesn't work in PHPpreg_match_all( "/(?:,|^)(?<!\\)\".*?(?<!\\)\"(?
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Can be used in combination withbefore. Uses Python regular expressions; seehttps://docs.python.org/3/library/re.html. Uses DOTALL, which means the.special charactercan match newlines. Does not use MULTILINE, so^and$will only match the beginning and end of the file. ...
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My problem was not double-escaping backslash characters:<?php// Input test$input = "\"something\",\"something here\",\"some\nnew\nlines\",\"this is the end\"";// Work with online regexp testers, doesn't work in PHPpreg_match_all( "/(?:,|^)(?<!\\)\".*?(?<!\\)\"(?
This pair of a backslash followed by a single character is called an escape sequence, and the act of putting a backslash in front of a special character is called escaping that character. An escape sequence is interpreted as a single element. There are of course escape sequences that do ...