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<?php /** * Tools to help with ASCII in UTF-8 * * @package utf8 */ //-------------------------------------------------------------------- /** * 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 * @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 * @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]/',$str) !== 1); } return FALSE; } //-------------------------------------------------------------------- /** * Strip out all non-7bit ASCII bytes * If you need to transmit a string to system which you know can only * support 7bit ASCII, you could use this function. * @param string * @return string with non ASCII bytes removed * @package utf8 * @see utf8_strip_non_ascii_ctrl */ function utf8_strip_non_ascii($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 $result; } //-------------------------------------------------------------------- /** * Strip out all non 7bit ASCII bytes and ASCII device control codes. * For a list of ASCII device control codes see the 2nd table here: * http://www.w3schools.com/tags/ref_ascii.asp * * @param string * @return boolean TRUE if it's all ASCII * @package utf8 */ function utf8_strip_non_ascii_ctrl($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 */ 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; }