221 lines
8.4 KiB
PHP
221 lines
8.4 KiB
PHP
<?php
|
|
/**
|
|
* Tools to help with ASCII in UTF-8
|
|
* @version $Id$
|
|
* @package utf8
|
|
* @subpackage ascii
|
|
*/
|
|
|
|
//--------------------------------------------------------------------
|
|
/**
|
|
* Tests whether a string contains only 7bit ASCII bytes.
|
|
* You might use this to conditionally check whether a string
|
|
* needs handling as UTF-8 or not, potentially offering performance
|
|
* benefits by using the native PHP equivalent if it's just ASCII e.g.;
|
|
*
|
|
* <code>
|
|
* if ( utf8_is_ascii($someString) ) {
|
|
* // It's just ASCII - use the native PHP version
|
|
* $someString = strtolower($someString);
|
|
* } else {
|
|
* $someString = utf8_strtolower($someString);
|
|
* }
|
|
* </code>
|
|
*
|
|
* @param string
|
|
* @return boolean TRUE if it's all ASCII
|
|
* @package utf8
|
|
* @subpackage ascii
|
|
* @see utf8_is_ascii_ctrl
|
|
*/
|
|
function utf8_is_ascii($str) {
|
|
// Search for any bytes which are outside the ASCII range...
|
|
return (preg_match('/(?:[^\x00-\x7F])/',$str) !== 1);
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
/**
|
|
* Tests whether a string contains only 7bit ASCII bytes with device
|
|
* control codes omitted. The device control codes can be found on the
|
|
* second table here: http://www.w3schools.com/tags/ref_ascii.asp
|
|
*
|
|
* @param string
|
|
* @return boolean TRUE if it's all ASCII without device control codes
|
|
* @package utf8
|
|
* @subpackage ascii
|
|
* @see utf8_is_ascii
|
|
*/
|
|
function utf8_is_ascii_ctrl($str) {
|
|
if ( strlen($str) > 0 ) {
|
|
// Search for any bytes which are outside the ASCII range,
|
|
// or are device control codes
|
|
return (preg_match('/[^\x09\x0A\x0D\x20-\x7E]/',$str) !== 1);
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
/**
|
|
* Strip out all non-7bit ASCII bytes
|
|
* If you need to transmit a string to system which you know can only
|
|
* support 7bit ASCII, you could use this function.
|
|
* @param string
|
|
* @return string with non ASCII bytes removed
|
|
* @package utf8
|
|
* @subpackage ascii
|
|
* @see utf8_strip_non_ascii_ctrl
|
|
*/
|
|
function utf8_strip_non_ascii($str) {
|
|
ob_start();
|
|
while ( preg_match(
|
|
'/^([\x00-\x7F]+)|([^\x00-\x7F]+)/S',
|
|
$str, $matches) ) {
|
|
if ( !isset($matches[2]) ) {
|
|
echo $matches[0];
|
|
}
|
|
$str = substr($str, strlen($matches[0]));
|
|
}
|
|
$result = ob_get_contents();
|
|
ob_end_clean();
|
|
return $result;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
/**
|
|
* Strip out device control codes in the ASCII range
|
|
* which are not permitted in XML. Note that this leaves
|
|
* multi-byte characters untouched - it only removes device
|
|
* control codes
|
|
* @see http://hsivonen.iki.fi/producing-xml/#controlchar
|
|
* @param string
|
|
* @return string control codes removed
|
|
*/
|
|
function utf8_strip_ascii_ctrl($str) {
|
|
ob_start();
|
|
while ( preg_match(
|
|
'/^([^\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+)|([\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+)/S',
|
|
$str, $matches) ) {
|
|
if ( !isset($matches[2]) ) {
|
|
echo $matches[0];
|
|
}
|
|
$str = substr($str, strlen($matches[0]));
|
|
}
|
|
$result = ob_get_contents();
|
|
ob_end_clean();
|
|
return $result;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
/**
|
|
* Strip out all non 7bit ASCII bytes and ASCII device control codes.
|
|
* For a list of ASCII device control codes see the 2nd table here:
|
|
* http://www.w3schools.com/tags/ref_ascii.asp
|
|
*
|
|
* @param string
|
|
* @return boolean TRUE if it's all ASCII
|
|
* @package utf8
|
|
* @subpackage ascii
|
|
*/
|
|
function utf8_strip_non_ascii_ctrl($str) {
|
|
ob_start();
|
|
while ( preg_match(
|
|
'/^([\x09\x0A\x0D\x20-\x7E]+)|([^\x09\x0A\x0D\x20-\x7E]+)/S',
|
|
$str, $matches) ) {
|
|
if ( !isset($matches[2]) ) {
|
|
echo $matches[0];
|
|
}
|
|
$str = substr($str, strlen($matches[0]));
|
|
}
|
|
$result = ob_get_contents();
|
|
ob_end_clean();
|
|
return $result;
|
|
}
|
|
|
|
//---------------------------------------------------------------
|
|
/**
|
|
* Replace accented UTF-8 characters by unaccented ASCII-7 "equivalents".
|
|
* The purpose of this function is to replace characters commonly found in Latin
|
|
* alphabets with something more or less equivalent from the ASCII range. This can
|
|
* be useful for converting a UTF-8 to something ready for a filename, for example.
|
|
* Following the use of this function, you would probably also pass the string
|
|
* through utf8_strip_non_ascii to clean out any other non-ASCII chars
|
|
* Use the optional parameter to just deaccent lower ($case = -1) or upper ($case = 1)
|
|
* letters. Default is to deaccent both cases ($case = 0)
|
|
*
|
|
* For a more complete implementation of transliteration, see the utf8_to_ascii package
|
|
* available from the phputf8 project downloads:
|
|
* http://prdownloads.sourceforge.net/phputf8
|
|
*
|
|
* @param string UTF-8 string
|
|
* @param int (optional) -1 lowercase only, +1 uppercase only, 1 both cases
|
|
* @param string UTF-8 with accented characters replaced by ASCII chars
|
|
* @return string accented chars replaced with ascii equivalents
|
|
* @author Andreas Gohr <andi@splitbrain.org>
|
|
* @package utf8
|
|
* @subpackage ascii
|
|
*/
|
|
function utf8_accents_to_ascii( $str, $case=0 ){
|
|
|
|
static $UTF8_LOWER_ACCENTS = NULL;
|
|
static $UTF8_UPPER_ACCENTS = NULL;
|
|
|
|
if($case <= 0){
|
|
|
|
if ( is_null($UTF8_LOWER_ACCENTS) ) {
|
|
$UTF8_LOWER_ACCENTS = array(
|
|
'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' => 'oe', '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' => 'ae', 'í' => 'i', 'ŕ' => 'r', 'ê' => 'e', 'ü' => 'ue', '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',
|
|
);
|
|
}
|
|
|
|
$str = str_replace(
|
|
array_keys($UTF8_LOWER_ACCENTS),
|
|
array_values($UTF8_LOWER_ACCENTS),
|
|
$str
|
|
);
|
|
}
|
|
|
|
if($case >= 0){
|
|
if ( is_null($UTF8_UPPER_ACCENTS) ) {
|
|
$UTF8_UPPER_ACCENTS = array(
|
|
'À' => 'A', 'Ô' => 'O', 'Ď' => 'D', 'Ḟ' => 'F', 'Ë' => 'E', 'Š' => 'S', 'Ơ' => 'O',
|
|
'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' => 'Oe', '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' => 'Ae', 'Í' => 'I', 'Ŕ' => 'R', 'Ê' => 'E', 'Ü' => 'Ue', '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', 'Ĕ' => 'E',
|
|
);
|
|
}
|
|
$str = str_replace(
|
|
array_keys($UTF8_UPPER_ACCENTS),
|
|
array_values($UTF8_UPPER_ACCENTS),
|
|
$str
|
|
);
|
|
}
|
|
|
|
return $str;
|
|
|
|
}
|