Bug #78191 [Opn->Nab]: /^[a-z]+$/ can be match "\n"

Edit report at https://bugs.php.net/bug.php?id=78191&edit=1 ID: 78191 Updated by: danack@php.net Reported by: sunweiqiang8 at gmail dot com Summary: /^[a-z]+$/ can be match "\n" -Status: Open +Status: Not a bug Type: Bug Package: *Regular Expressions Operating System: CentOS 7.6 PHP Version: 7.2.19 Block user comment: N Private report: N New Comment: This is the same behaviour as Perl, and comes from the PCRE library used by PHP. https://www.regular-expressions.info/anchors.html "Because Perl returns a string with a newline at the end when reading a line from a file, Perl's regex engine matches $ at the position before the line break at the end of the string even when multi-line mode is turned off. Perl also matches $ at the very end of the string, regardless of whether that character is a line break. So ^\d+$ matches 123 whether the subject string is 123 or 123\n." If you don't want this, you can use the D modifier. https://www.php.net/manual/en/reference.pcre.pattern.modifiers.php "D (PCRE_DOLLAR_ENDONLY) If this modifier is set, a dollar metacharacter in the pattern matches only at the end of the subject string. Without this modifier, a dollar also matches immediately before the final character if it is a newline (but not before any other newlines). This modifier is ignored if m modifier is set. There is no equivalent to this modifier in Perl." Previous Comments: ------------------------------------------------------------------------ [2019-06-21 01:28:05] sunweiqiang8 at gmail dot com Description: ------------ Only PHP can succeed. # php preg_match("/^[a-z]+$/", "abc\n"); #int(1) # javascript var reg = /^[a-z]+$/; console.log(reg.test("abc\n")); # false # java(jdk11) System.out.println(Pattern.matches("^[a-z]+$", "abc\n")); # false Test script: --------------- <?php var_dump(preg_match("/^[a-z]+$/", "abc\n")); ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=78191&edit=1