I am trying to convert emoji to unicode with php
, more info: https://unicode.org/emoji/charts/full-emoji-list.html
How to convert this π into this U+1F603 with php?
function convert_emoji($var){
}
I found a simple way to solve, so I will answer my own question, but if somebody would like to improve this function, would be cool.
<?php
function emoji_to_unicode($emoji) {
$emoji = mb_convert_encoding($emoji, 'UTF-32', 'UTF-8');
$unicode = strtoupper(preg_replace("/^[0]+/","U+",bin2hex($emoji)));
return $unicode;
}
$var = "π";
echo emoji_to_unicode($var);
?>
The Intl extension provides a function to return the codepoint for a character. As it returns an integer, you just need to convert it to a hex string.
function emoji_to_unicode($emoji) {
return sprintf('U+%X', IntlChar::ord($emoji));
}
Related
This question looks embarrassingly simple, but I haven't been able to find an answer.
What is the PHP equivalent to the following C# line of code?
string str = "\u1000";
This sample creates a string with a single Unicode character whose "Unicode numeric value" is 1000 in hexadecimal (4096 in decimal).
That is, in PHP, how can I create a string with a single Unicode character whose "Unicode numeric value" is known?
PHP 7.0.0 has introduced the "Unicode codepoint escape" syntax.
It's now possible to write Unicode characters easily by using a double-quoted or a heredoc string, without calling any function.
$unicodeChar = "\u{1000}";
Because JSON directly supports the \uxxxx syntax the first thing that comes into my mind is:
$unicodeChar = '\u1000';
echo json_decode('"'.$unicodeChar.'"');
Another option would be to use mb_convert_encoding()
echo mb_convert_encoding('α', 'UTF-8', 'HTML-ENTITIES');
or make use of the direct mapping between UTF-16BE (big endian) and the Unicode codepoint:
echo mb_convert_encoding("\x10\x00", 'UTF-8', 'UTF-16BE');
I wonder why no one has mentioned this yet, but you can do an almost equivalent version using escape sequences in double quoted strings:
\x[0-9A-Fa-f]{1,2}
The sequence of characters matching the regular expression is a
character in hexadecimal notation.
ASCII example:
<?php
echo("\x48\x65\x6C\x6C\x6F\x20\x57\x6F\x72\x6C\x64\x21");
?>
Hello World!
So for your case, all you need to do is $str = "\x30\xA2";. But these are bytes, not characters. The byte representation of the Unicode codepoint coincides with UTF-16 big endian, so we could print it out directly as such:
<?php
header('content-type:text/html;charset=utf-16be');
echo("\x30\xA2");
?>
γ’
If you are using a different encoding, you'll need alter the bytes accordingly (mostly done with a library, though possible by hand too).
UTF-16 little endian example:
<?php
header('content-type:text/html;charset=utf-16le');
echo("\xA2\x30");
?>
γ’
UTF-8 example:
<?php
header('content-type:text/html;charset=utf-8');
echo("\xE3\x82\xA2");
?>
γ’
There is also the pack function, but you can expect it to be slow.
PHP does not know these Unicode escape sequences. But as unknown escape sequences remain unaffected, you can write your own function that converts such Unicode escape sequences:
function unicodeString($str, $encoding=null) {
if (is_null($encoding)) $encoding = ini_get('mbstring.internal_encoding');
return preg_replace_callback('/\\\\u([0-9a-fA-F]{4})/u', create_function('$match', 'return mb_convert_encoding(pack("H*", $match[1]), '.var_export($encoding, true).', "UTF-16BE");'), $str);
}
Or with an anonymous function expression instead of create_function:
function unicodeString($str, $encoding=null) {
if (is_null($encoding)) $encoding = ini_get('mbstring.internal_encoding');
return preg_replace_callback('/\\\\u([0-9a-fA-F]{4})/u', function($match) use ($encoding) {
return mb_convert_encoding(pack('H*', $match[1]), $encoding, 'UTF-16BE');
}, $str);
}
Its usage:
$str = unicodeString("\u1000");
html_entity_decode('γ¨', 0, 'UTF-8');
This works too. However the json_decode() solution is a lot faster (around 50 times).
Try Portable UTF-8:
$str = utf8_chr( 0x1000 );
$str = utf8_chr( '\u1000' );
$str = utf8_chr( 4096 );
All work exactly the same way. You can get the codepoint of a character with utf8_ord(). Read more about Portable UTF-8.
As mentioned by others, PHP 7 introduces support for the \u Unicode syntax directly.
As also mentioned by others, the only way to obtain a string value from any sensible Unicode character description in PHP, is by converting it from something else (e.g. JSON parsing, HTML parsing or some other form). But this comes at a run-time performance cost.
However, there is one other option. You can encode the character directly in PHP with \x binary escaping. The \x escape syntax is also supported in PHP 5.
This is especially useful if you prefer not to enter the character directly in a string through its natural form. For example, if it is an invisible control character, or other hard to detect whitespace.
First, a proof example:
// Unicode Character 'HAIR SPACE' (U+200A)
$htmlEntityChar = "β";
$realChar = html_entity_decode($htmlEntityChar);
$phpChar = "\xE2\x80\x8A";
echo 'Proof: ';
var_dump($realChar === $phpChar); // bool(true)
Note that, as mentioned by Pacerier in another answer, this binary code is unique to a specific character encoding. In the above example, \xE2\x80\x8A is the binary coding for U+200A in UTF-8.
The next question is, how do you get from U+200A to \xE2\x80\x8A?
Below is a PHP script to generate the escape sequence for any character, based on either a JSON string, HTML entity, or any other method once you have it as a native string.
function str_encode_utf8binary($str) {
/** #author Krinkle 2018 */
$output = '';
foreach (str_split($str) as $octet) {
$ordInt = ord($octet);
// Convert from int (base 10) to hex (base 16), for PHP \x syntax
$ordHex = base_convert($ordInt, 10, 16);
$output .= '\x' . $ordHex;
}
return $output;
}
function str_convert_html_to_utf8binary($str) {
return str_encode_utf8binary(html_entity_decode($str));
}
function str_convert_json_to_utf8binary($str) {
return str_encode_utf8binary(json_decode($str));
}
// Example for raw string: Unicode Character 'INFINITY' (U+221E)
echo str_encode_utf8binary('β') . "\n";
// \xe2\x88\x9e
// Example for HTML: Unicode Character 'HAIR SPACE' (U+200A)
echo str_convert_html_to_utf8binary('β') . "\n";
// \xe2\x80\x8a
// Example for JSON: Unicode Character 'HAIR SPACE' (U+200A)
echo str_convert_json_to_utf8binary('"\u200a"') . "\n";
// \xe2\x80\x8a
function unicode_to_textstring($str){
$rawstr = pack('H*', $str);
$newstr = iconv('UTF-16BE', 'UTF-8', $rawstr);
return $newstr;
}
$msg = '67714eac99c500200054006f006b0079006f002000530074006100740069006f006e003a0020';
echo unicode_to_textstring($str);
In C++, it's possible create a UTF-8 string using this kind of notation: "\uD840\uDC50".
However this doesn't work in PHP. Is there a similar notation?
If not, is there any built-in way to create a UTF-8 string knowing its Unicode code point?
I've ended up implementing it like this:
$utf8 = html_entity_decode("δΈ", ENT_COMPAT, 'UTF-8');
function hexToString($str){return chr(hexdec(substr($str, 2)));}
$result = preg_replace_callback("/(\\\\x..)/isU", function($m) { return hexToString($m[0] ); }, $str);
In PHP, how can I convert a string of glyph values like this:
0x00E3
0x00E9
0x00EA
0x00EB
0x00E8
0x00ED
0x00EE
0x00EF
0x00EC
0x00F1
0x00F3
Into the correct UTF-8 glyph?
I figured it out myself, modified from here:
function val2utf8($val)
{
$val=hexdec($val);
if($val<=0x7F) return chr($val);
if($val<=0x7FF) return chr(($val>>6)+192).chr(($val&63)+128);
if($val<=0xFFFF) return chr(($val>>12)+224).chr((($val>>6)&63)+128).chr(($val&63)+128);
if($val<=0x1FFFFF) return chr(($val>>18)+240).chr((($val>>12)&63)+128).chr((($val>>6)&63)+128).chr(($val&63)+128);
return '';
}
This question looks embarrassingly simple, but I haven't been able to find an answer.
What is the PHP equivalent to the following C# line of code?
string str = "\u1000";
This sample creates a string with a single Unicode character whose "Unicode numeric value" is 1000 in hexadecimal (4096 in decimal).
That is, in PHP, how can I create a string with a single Unicode character whose "Unicode numeric value" is known?
PHP 7.0.0 has introduced the "Unicode codepoint escape" syntax.
It's now possible to write Unicode characters easily by using a double-quoted or a heredoc string, without calling any function.
$unicodeChar = "\u{1000}";
Because JSON directly supports the \uxxxx syntax the first thing that comes into my mind is:
$unicodeChar = '\u1000';
echo json_decode('"'.$unicodeChar.'"');
Another option would be to use mb_convert_encoding()
echo mb_convert_encoding('α', 'UTF-8', 'HTML-ENTITIES');
or make use of the direct mapping between UTF-16BE (big endian) and the Unicode codepoint:
echo mb_convert_encoding("\x10\x00", 'UTF-8', 'UTF-16BE');
I wonder why no one has mentioned this yet, but you can do an almost equivalent version using escape sequences in double quoted strings:
\x[0-9A-Fa-f]{1,2}
The sequence of characters matching the regular expression is a
character in hexadecimal notation.
ASCII example:
<?php
echo("\x48\x65\x6C\x6C\x6F\x20\x57\x6F\x72\x6C\x64\x21");
?>
Hello World!
So for your case, all you need to do is $str = "\x30\xA2";. But these are bytes, not characters. The byte representation of the Unicode codepoint coincides with UTF-16 big endian, so we could print it out directly as such:
<?php
header('content-type:text/html;charset=utf-16be');
echo("\x30\xA2");
?>
γ’
If you are using a different encoding, you'll need alter the bytes accordingly (mostly done with a library, though possible by hand too).
UTF-16 little endian example:
<?php
header('content-type:text/html;charset=utf-16le');
echo("\xA2\x30");
?>
γ’
UTF-8 example:
<?php
header('content-type:text/html;charset=utf-8');
echo("\xE3\x82\xA2");
?>
γ’
There is also the pack function, but you can expect it to be slow.
PHP does not know these Unicode escape sequences. But as unknown escape sequences remain unaffected, you can write your own function that converts such Unicode escape sequences:
function unicodeString($str, $encoding=null) {
if (is_null($encoding)) $encoding = ini_get('mbstring.internal_encoding');
return preg_replace_callback('/\\\\u([0-9a-fA-F]{4})/u', create_function('$match', 'return mb_convert_encoding(pack("H*", $match[1]), '.var_export($encoding, true).', "UTF-16BE");'), $str);
}
Or with an anonymous function expression instead of create_function:
function unicodeString($str, $encoding=null) {
if (is_null($encoding)) $encoding = ini_get('mbstring.internal_encoding');
return preg_replace_callback('/\\\\u([0-9a-fA-F]{4})/u', function($match) use ($encoding) {
return mb_convert_encoding(pack('H*', $match[1]), $encoding, 'UTF-16BE');
}, $str);
}
Its usage:
$str = unicodeString("\u1000");
html_entity_decode('γ¨', 0, 'UTF-8');
This works too. However the json_decode() solution is a lot faster (around 50 times).
Try Portable UTF-8:
$str = utf8_chr( 0x1000 );
$str = utf8_chr( '\u1000' );
$str = utf8_chr( 4096 );
All work exactly the same way. You can get the codepoint of a character with utf8_ord(). Read more about Portable UTF-8.
As mentioned by others, PHP 7 introduces support for the \u Unicode syntax directly.
As also mentioned by others, the only way to obtain a string value from any sensible Unicode character description in PHP, is by converting it from something else (e.g. JSON parsing, HTML parsing or some other form). But this comes at a run-time performance cost.
However, there is one other option. You can encode the character directly in PHP with \x binary escaping. The \x escape syntax is also supported in PHP 5.
This is especially useful if you prefer not to enter the character directly in a string through its natural form. For example, if it is an invisible control character, or other hard to detect whitespace.
First, a proof example:
// Unicode Character 'HAIR SPACE' (U+200A)
$htmlEntityChar = "β";
$realChar = html_entity_decode($htmlEntityChar);
$phpChar = "\xE2\x80\x8A";
echo 'Proof: ';
var_dump($realChar === $phpChar); // bool(true)
Note that, as mentioned by Pacerier in another answer, this binary code is unique to a specific character encoding. In the above example, \xE2\x80\x8A is the binary coding for U+200A in UTF-8.
The next question is, how do you get from U+200A to \xE2\x80\x8A?
Below is a PHP script to generate the escape sequence for any character, based on either a JSON string, HTML entity, or any other method once you have it as a native string.
function str_encode_utf8binary($str) {
/** #author Krinkle 2018 */
$output = '';
foreach (str_split($str) as $octet) {
$ordInt = ord($octet);
// Convert from int (base 10) to hex (base 16), for PHP \x syntax
$ordHex = base_convert($ordInt, 10, 16);
$output .= '\x' . $ordHex;
}
return $output;
}
function str_convert_html_to_utf8binary($str) {
return str_encode_utf8binary(html_entity_decode($str));
}
function str_convert_json_to_utf8binary($str) {
return str_encode_utf8binary(json_decode($str));
}
// Example for raw string: Unicode Character 'INFINITY' (U+221E)
echo str_encode_utf8binary('β') . "\n";
// \xe2\x88\x9e
// Example for HTML: Unicode Character 'HAIR SPACE' (U+200A)
echo str_convert_html_to_utf8binary('β') . "\n";
// \xe2\x80\x8a
// Example for JSON: Unicode Character 'HAIR SPACE' (U+200A)
echo str_convert_json_to_utf8binary('"\u200a"') . "\n";
// \xe2\x80\x8a
function unicode_to_textstring($str){
$rawstr = pack('H*', $str);
$newstr = iconv('UTF-16BE', 'UTF-8', $rawstr);
return $newstr;
}
$msg = '67714eac99c500200054006f006b0079006f002000530074006100740069006f006e003a0020';
echo unicode_to_textstring($str);
I want to have different process for English word and Japanese word in this function
function process_word($word) {
if($word is english) {
/////////
}else if($word is japanese) {
////////
}
}
thank you
A quick solution that doesn't need the mb_string extension:
if (strlen($str) != strlen(utf8_decode($str))) {
// $str uses multi-byte chars (isn't English)
}
else {
// $str is ASCII (probably English)
}
Or a modification of the solution provided by #Alexander Konstantinov:
function isKanji($str) {
return preg_match('/[\x{4E00}-\x{9FBF}]/u', $str) > 0;
}
function isHiragana($str) {
return preg_match('/[\x{3040}-\x{309F}]/u', $str) > 0;
}
function isKatakana($str) {
return preg_match('/[\x{30A0}-\x{30FF}]/u', $str) > 0;
}
function isJapanese($str) {
return isKanji($str) || isHiragana($str) || isKatakana($str);
}
This function checks whether a word contains at least one Japanese letter (I found unicode range for Japanese letters in Wikipedia).
function isJapanese($word) {
return preg_match('/[\x{4E00}-\x{9FBF}\x{3040}-\x{309F}\x{30A0}-\x{30FF}]/u', $word);
}
You could try Google's Translation API that has a detection function:
http://code.google.com/apis/language/translate/v2/using_rest.html#detect-language
Try with mb_detect_encoding function, if encoding is EUC-JP or UTF-8 / UTF-16 it can be japanese, otherwise english.
The better is if you can ensure which encoding each language, as UTF encodings can be used for many languages
English text usually consists only of ASCII characters (or better say, characters in ASCII range).
You can try to convert the charset and check if it succeeds.
Take a look at iconv: http://www.php.net/manual/en/function.iconv.php
If you can convert a string to ISO-8859-1 it might be english, if you can convert to iso-2022-jp it is propably japanese (I might be wrong for the exact charsets, you should google for them).