preg_match（）：PHP Regex上的文本范围混乱

Question

I want to convert java regex to php regex. But I get error "- Text range out of order"

This is JAVA regex

"[^\\u0020-\\u007F\u011f\u00fc\u015f\u00f6\u00e7\u011e\u00dc\u015e\u0130\u00d6\u00c7\u0131]";

This is PHP regex

preg_replace("/[^\\x{0020}-\\x{007F}\\x{011f}\\x{00fc}\\x{015f}\\x{00f6}\\x{00e7}\\x{011e}\\x{00dc}\\x{015e}\\x{0130}\\x{00d6}\\x{00c7}\\x{0131}]/i","",".çşüiğıyuasdfaadsff");

I get following error "- Text range out of order"

Any Help?

Answer 1

By default, the regex engine interprets the input string and the regex as an array of bytes in PHP. You should get an error about the character value too large, since \\x{011f} or \\x{011e} are larger than 255 (the maximum value of one byte).

To match Unicode code points, rather than arbitrary byte sequences, use u flag to turn on UTF mode.

$re = '~[^\x{0020}-\x{007F}\x{011f}\x{00fc}\x{015f}\x{00f6}\x{00e7}\x{011e}\x{00dc}\x{015e}\x{0130}\x{00d6}\x{00c7}\x{0131}]~u';

RegEx Demo