In my string I have utf-8 non-breaking space (0xc2a0) and I want to replace it with something else.
When I use
$str=preg_replace('~xc2xa0~', 'X', $str);
it works OK.
But when I use
$str=preg_replace('~x{C2A0}~siu', 'W', $str);
non-breaking space is not found (and replaced).
Why? What is wrong with second regexp?
The format x{C2A0} is correct, also I used u flag.
This email (archived here) contains a list of all Unicode whitespace characters encoded in UTF-8, UTF-16, and HTML.
In the archived link look for the 'utf8_whitespace_table' function.
static $whitespace = array(
"SPACE" => "x20",
"NO-BREAK SPACE" => "xc2xa0",
"OGHAM SPACE MARK" => "xe1x9ax80",
"EN QUAD" => "xe2x80x80",
"EM QUAD" => "xe2x80x81",
"EN SPACE" => "xe2x80x82",
"EM SPACE" => "xe2x80x83",
"THREE-PER-EM SPACE" => "xe2x80x84",
"FOUR-PER-EM SPACE" => "xe2x80x85",
"SIX-PER-EM SPACE" => "xe2x80x86",
"FIGURE SPACE" => "xe2x80x87",
"PUNCTUATION SPACE" => "xe2x80x88",
"THIN SPACE" => "xe2x80x89",
"HAIR SPACE" => "xe2x80x8a",
"ZERO WIDTH SPACE" => "xe2x80x8b",
"NARROW NO-BREAK SPACE" => "xe2x80xaf",
"MEDIUM MATHEMATICAL SPACE" => "xe2x81x9f",
"IDEOGRAPHIC SPACE" => "xe3x80x80",
);
The Arabic regex is:
[u0600-u06FF]
Actually, ?-? is a subset of this Arabic range, so I think you can remove them from the pattern.
So, in JS it will be
/^[a-z0-9+,()/'su0600-u06FF-]+$/i
See regex demo
Thanks guys, this is how I managed to solve the 'cross' windows and linux requirement:
MinGW , and MSYSlibiconv source packagelibiconv via MSYS.That's about it.
For this PHP regex:
$str = preg_replace ( '{(.)1+}', '$1', $str );
$str = preg_replace ( '{[ '-_()]}', '', $str )
In Java:
str = str.replaceAll("(.)\1+", "$1");
str = str.replaceAll("[ '-_\(\)]", "");
I suggest you to provide your input and expected output then you will get better answers on how it can be done in PHP and/or Java.
Actually the documentation about escape sequences in PHP is wrong. When you use
xc2xa0syntax, it searches for UTF-8 character. But withx{c2a0}syntax, it tries to convert the Unicode sequence to UTF-8 encoded character.A non breaking space is
U+00A0(Unicode) but encoded asC2A0in UTF-8. So if you try with the pattern~x{00a0}~siu, it will work as expected.