How would I extract all alpha characters (including space) like for example:
#john camel07 st.doe!
where I only want to get john camel stdoe.
I tried using the regex from this another SO question but it does not work.
$re = "/[^a-zA-Z ]+/";
$str = "#john camel07 st.doe!";
$subst = "";
$result = preg_replace($re, $subst, $str);
You can simply replace by empty string all non alpha and space characters.See demo.
https://www.regex101.com/r/rL8wP1/7
If your data contains unicode, this should work a bit better:
echo preg_replace("/[^[:alpha:][:space:]]/ui", '', '#john camel07 st.doe!');
Borrowed with a change from https://stackoverflow.com/a/659030/1935500
I have the following PHP code:
$search = "foo bar que";
$search_string = str_replace(" ", "|", $search);
$text = "This is my foo text with qué and other accented characters.";
$text = preg_replace("/$search_string/i", "<b>$0</b>", $text);
echo $text;
Obviously, "que" does not match "qué". How can I change that? Is there a way to make preg_replace ignore all accents?
The characters that have to match (Spanish):
á,Á,é,É,í,Í,ó,Ó,ú,Ú,ñ,Ñ
I don't want to replace all accented characters before applying the regex, because the characters in the text should stay the same:
"This is my foo text with qué and other accented characters."
and not
"This is my foo text with que and other accented characters."
The solution I finally used:
$search_for_preg = str_ireplace(["e","a","o","i","u","n"],
["[eé]","[aá]","[oó]","[ií]","[uú]","[nñ]"],
$search_string);
$text = preg_replace("/$search_for_preg/iu", "<b>$0</b>", $text)."\n";
$search = str_replace(
['a','e','i','o','u','ñ'],
['[aá]','[eé]','[ií]','[oó]','[uú]','[nñ]'],
$search)
This and the same for upper case will complain your request. A side note: ñ replacemet sounds invalid to me, as 'niño' is totaly diferent from 'nino'
If you want to use the captured text in the replacement string, you have to use character classes in your $search variable (anyway, you set it manually):
$search = "foo bar qu[eé]"
And so on.
You could try defining an array like this:
$vowel_replacements = array(
"e" => "eé",
// Other letters mapped to their other versions
);
Then, before your preg_match call, do something like this:
foreach ($vowel_replacements as $vowel => $replacements) {
str_replace($search_string, "$vowel", "[$replacements]");
}
If I'm remembering my PHP right, that should replace your vowels with a character class of their accented forms -- which will keep it in place. It also lets you change the search string far more easily; you don't have to remember to replaced the vowels with their character classes. All you have to remember is to use the non-accented form in your search string.
(If there's some special syntax I'm forgetting that does this without a foreach, please comment and let me know.)
I have been trying to remove junk character from a stream of html strings using PHP but haven't been successfull yet. Is there any special syntax or logics to remove special character from the string?
I had tried this so far, but ain't working
$new_string = preg_replace("�", "", $HtmlText);
echo '<pre>'.$new_string.'</pre>';
\p{S}
You can use this.\p{S} matches math symbols, currency signs, dingbats, box-drawing characters, etc
See demo.
https://www.regex101.com/r/rK5lU1/30
$re = "/\\p{S}/i";
$str = "asdas�sadsad";
$subst = "";
$result = preg_replace($re, $subst, $str);
This is due to mismatch in Charset between database and front-end. Correcting this will fix the issue.
function clean($string) {
return preg_replace('/[^A-Za-z0-9\-]/', '', $string); // Removes special chars.
}
So I'm trying to generate slugs to store in my DB. My locales include English, some European languages and Japanese.
I allow \d, \w, European characters are transliterated, Japanese characters are untouched. Period, plus and dash (-) are kept. Leading/trailing whitespace is removed, while the whitespace in between is replaced by a dash.
Here is some code: (please feel free to improve it, given my conditions above as my regex-fu is currently white belt tier)
function ToSlug($string, $separator='-') {
$url = iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $string);
$url = preg_replace('/[^\d\w一-龠ぁ-ゔァ-ヴー々〆〤.+ -]/', '', $url);
$url = strtolower($url);
$url = preg_replace('/[ ' . $separator . ']+/', $separator, $url);
return $url;
}
I'm testing this function, however my JP characters are not getting through, they are simply replaced by ''. Whilst I do suspect it's the //IGNORE that's taking them out, I need that their or else my German, France transliterations will not work. Any ideas on how I can fix this?
EDIT: I'm not sure if Japanese Kanji covers all of Simplified Chinese but I'm gonna need that and Korean as well. If anyone who knows the regex off the bat please let me know it will save me some time searching. Thanks.
Note: I am not familiar with the Japanese writing system.
Looking at the function the iconv call appears to remove all the Japanese characters. Instead of using iconv to transliterate, it may be easier to just create a function that does it:
function _toSlugTransliterate($string) {
// Lowercase equivalents found at:
// https://github.com/kohana/core/blob/3.3/master/utf8/transliterate_to_ascii.php
$lower = [
'à'=>'a','ô'=>'o','ď'=>'d','ḟ'=>'f','ë'=>'e','š'=>'s','ơ'=>'o',
'ß'=>'ss','ă'=>'a','ř'=>'r','ț'=>'t','ň'=>'n','ā'=>'a','ķ'=>'k',
'ŝ'=>'s','ỳ'=>'y','ņ'=>'n','ĺ'=>'l','ħ'=>'h','ṗ'=>'p','ó'=>'o',
'ú'=>'u','ě'=>'e','é'=>'e','ç'=>'c','ẁ'=>'w','ċ'=>'c','õ'=>'o',
'ṡ'=>'s','ø'=>'o','ģ'=>'g','ŧ'=>'t','ș'=>'s','ė'=>'e','ĉ'=>'c',
'ś'=>'s','î'=>'i','ű'=>'u','ć'=>'c','ę'=>'e','ŵ'=>'w','ṫ'=>'t',
'ū'=>'u','č'=>'c','ö'=>'o','è'=>'e','ŷ'=>'y','ą'=>'a','ł'=>'l',
'ų'=>'u','ů'=>'u','ş'=>'s','ğ'=>'g','ļ'=>'l','ƒ'=>'f','ž'=>'z',
'ẃ'=>'w','ḃ'=>'b','å'=>'a','ì'=>'i','ï'=>'i','ḋ'=>'d','ť'=>'t',
'ŗ'=>'r','ä'=>'a','í'=>'i','ŕ'=>'r','ê'=>'e','ü'=>'u','ò'=>'o',
'ē'=>'e','ñ'=>'n','ń'=>'n','ĥ'=>'h','ĝ'=>'g','đ'=>'d','ĵ'=>'j',
'ÿ'=>'y','ũ'=>'u','ŭ'=>'u','ư'=>'u','ţ'=>'t','ý'=>'y','ő'=>'o',
'â'=>'a','ľ'=>'l','ẅ'=>'w','ż'=>'z','ī'=>'i','ã'=>'a','ġ'=>'g',
'ṁ'=>'m','ō'=>'o','ĩ'=>'i','ù'=>'u','į'=>'i','ź'=>'z','á'=>'a',
'û'=>'u','þ'=>'th','ð'=>'dh','æ'=>'ae','µ'=>'u','ĕ'=>'e','ı'=>'i',
];
return str_replace(array_keys($lower), array_values($lower), $string);
}
So, with some modifications, it could look something like this:
function toSlug($string, $separator = '-') {
// Work around this...
#$string = iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $string);
$string = _toSlugTransliterate($string);
// Remove unwanted chars + trim excess whitespace
// I got the character ranges from the following URL:
// https://stackoverflow.com/questions/6787716/regular-expression-for-japanese-characters#10508813
$regex = '/[^一-龠ぁ-ゔァ-ヴーａ-ｚＡ-Ｚ０-９a-zA-Z0-9々〆〤.+ -]|^\s+|\s+$/u';
$string = preg_replace($regex, '', $string);
// Using the mb_* version seems safer for some reason
$string = mb_strtolower($string);
// Same as before
$string = preg_replace("/[ {$separator}]+/", $separator, $string);
return $string;
}
$x = ' æøå!this.ís-a test-ゔヴ ーァ ';
echo toSlug($x);
In regex you can use unicode "scripts" to match letters of various languages. There is no "Japanese" one, but there are Hiragana, Katakana and Han. As I have no idea how Japanese is written, and how one could use these, I am not even going to try.
Using these scripts, however, would be done something like this:
'/[\p{Hiragana}\p{Katakana}\p{Han}]+/'
I am Parsing a web page for getting the web page prize. the prize include a Rupee symbol (₹).
So i used preg_replace to extract digits.
For example:
$str='₹ 1,195 ';
echo preg_replace("/[^0-9]/", '', $str);
Output is :
2091195
I tried same code to execute on http://writecodeonline.com/php/.
There i m getting correct output 1195.
I'm not getting what is the problem.
Thanks in Advance
If the unicode string is UTF-8, you can use the u (PCRE_UTF8) modifierDocs to tell preg_replace that it should use UTF-8 mode. If not, re-encode it to UTF-8 first and then use the modifier.
Example (Demo):
$subject = '₹ 1,195 ';
$pattern = "/[^0-9]/u";
$result = preg_replace($pattern, '', $subject);
echo $result;