unicode_decode
a little usefull function
<?php
function unicode2utf8($c)
{
$output="";
if($c < 0x80)
{
return chr($c);
}
else if($c < 0x800)
{
return chr( 0xc0 | ($c >> 6) ).chr( 0x80 | ($c & 0x3f) );
}
else if($c < 0x10000)
{
return chr( 0xe0 | ($c >> 12) ).chr( 0x80 | (($c >> 6) & 0x3f) ).chr( 0x80 | ($c & 0x3f) );
}
else if($c < 0x200000)
{
return chr(0xf0 | ($c >> 18)).chr(0x80 | (($c >> 12) & 0x3f)).chr(0x80 | (($c >> 6) & 0x3f)).chr(0x80 | ($c & 0x3f));
}
return false;
}
?>
unicode_encode
(No version information available, might be only in CVS)
unicode_encode — Convert a unicode string in any encoding
说明
string unicode_encode
( unicode $input
, string $encoding
[, int $errmode
] )
Takes a unicode string and converts it to a string in the specified encoding .
参数
- input
-
The unicode string that is converted.
- encoding
-
The new encoding for input .
- errmode
-
Conversion error mode. This parameter determines the action to take when the converter cannot convert a character. For a list of available modes, refer to unicode_set_error_mode(). If the parameter is not set, the global error mode is used.
返回值
A string on success, or FALSE on failure.
错误／异常
Emits a E_WARNING level error if a converter cannot be created for the desired encoding .
范例
Example#1 A unicode_encode() example
Note: The characters will be seen instead of entities in the output.
<?php
header ('Content-Type: text/plain; charset=ISO-8859-2');
$encoded = unicode_encode ('\u0150\u0179', 'ISO-8859-2');
echo 'Unicode semantics: ', ini_get ('unicode_semantics'), PHP_EOL;
echo 'The string itself:', $encoded, PHP_EOL;
echo 'The length of the string: ', strlen ($encoded);
?>
上例的输出类似于：
Unicode semantics: 1 The string itself: ŐŹ The length of the string: 2
注释
Warning
本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。
add a note
User Contributed Notesunicode_encode
berlioz at nicematin dot fr
14-Dec-2007 09:37
14-Dec-2007 09:37
spam at or-k dot de
23-Feb-2007 12:45
23-Feb-2007 12:45
A PHP4 Version for converting a utf8 string/text to unicode:
function utf8_to_unicode( $str ) {
$unicode = array();
$values = array();
$lookingFor = 1;
for ($i = 0; $i < strlen( $str ); $i++ ) {
$thisValue = ord( $str[ $i ] );
if ( $thisValue < ord('A') ) {
// exclude 0-9
if ($thisValue >= ord('0') && $thisValue <= ord('9')) {
// number
$unicode[] = chr($thisValue);
}
else {
$unicode[] = '%'.dechex($thisValue);
}
} else {
if ( $thisValue < 128)
$unicode[] = $str[ $i ];
else {
if ( count( $values ) == 0 ) $lookingFor = ( $thisValue < 224 ) ? 2 : 3;
$values[] = $thisValue;
if ( count( $values ) == $lookingFor ) {
$number = ( $lookingFor == 3 ) ?
( ( $values[0] % 16 ) * 4096 ) + ( ( $values[1] % 64 ) * 64 ) + ( $values[2] % 64 ):
( ( $values[0] % 32 ) * 64 ) + ( $values[1] % 64 );
$number = dechex($number);
$unicode[] = (strlen($number)==3)?"%u0".$number:"%u".$number;
$values = array();
$lookingFor = 1;
} // if
} // if
}
} // for
return implode("",$unicode);
} // utf8_to_unicode
Hugo Dworak (post at o2 dot pl)
23-Nov-2005 10:54
23-Nov-2005 10:54
As for an example of the usage of the function unicode_encode:
<?php
header ('Content-Type: text/plain; charset=ISO-8859-2');
$encoded = unicode_encode ('\u0150\u0179', 'ISO-8859-2');
echo 'Unicode semantics: ', ini_get ('unicode_semantics'), PHP_EOL, 'The string itself: ';
printf ($encoded . PHP_EOL, '%s');
echo 'The length of the string: ', strlen ($encoded);
?>
The above example will output (please note that there will be characters instead of entities in the output):
Unicode semantics: 1
The string itself: ŐŹ
The length of the string: 2