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gyro/core/lib/helpers/string_impl/string.mbstring.cls.php

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<?php
/**
 * String class using mbstring stuff
 */
class StringMBString {
        /**
         * Check if given string matches current encoding
         * 
         * @param string $value Value to check
         * @param string $encoding Encoding to check against. Use FALSE for current encoding
         * @return bool
         */
        public function check_encoding($value, $encoding = false) {
                if (empty($encoding)) { 
                        $encoding = GyroLocale::get_charset(); 
                }
                return mb_check_encoding($value, $encoding);
        }
        
        /**
         * Convert input to current charset
         * 
         * @param string $value Input to convert
         * @param string $from Encoding to convert from. Use FALSE for auto-detecting encoding of $value
         * @param string $to Encoding to covert to. Use FALSE for current encoding set on GyroLocale
         * @return string Converted Value
         */
        public function convert($value, $from = false, $to = false) {
                if (empty($to)) { $to = GyroLocale::get_charset(); }
                
                $ret = $value;
                if (empty($from)) {
                        // Autodetecting
                        if (!$this->check_encoding($value, $to)) {
                                $ret = mb_convert_encoding($value, $to);
                        }
                }
                else {
                        $ret = mb_convert_encoding($value, $to, $from);
                }
                return $ret;
        }       
        
        /**
         * Character set aware strtolower()
         * 
         * @param String Value to convert into lowercase
         * @param Integer Number of chars to convert, 0 for all.
         * 
         * @return String converted string
         */
        public function to_lower($val) {
                return mb_strtolower($val, GyroLocale::get_charset());
        }
        
        /**
         * Character set aware strtoupper()
         * 
         * @param String Value to convert into upper case 
         * 
         * @return String converted string
         */
        public function to_upper($val) {
                return mb_strtoupper($val, GyroLocale::get_charset());
        }
        
        /**
         * Character set aware strlen()
         */
        public function length($val) {
                return mb_strlen($val, GyroLocale::get_charset());
        }

        public function strpos($haystack, $needle, $offset = NULL) {
                return mb_strpos($haystack, $needle, $offset, GyroLocale::get_charset());
        }

        public function stripos($haystack, $needle, $offset = NULL) {
                return mb_stripos($haystack, $needle, $offset, GyroLocale::get_charset());
        }

        public function strrpos($haystack, $needle) {
                if ($haystack == '') {
                        return false;
                }
                return mb_strrpos($haystack, $needle, GyroLocale::get_charset());
        }
        
        /**
         * Character set aware substr
         */
        public function substr($val, $start = 0, $length = NULL) {
                if ($length === NULL) {
                        $length = $this->length($val);
                }
                return mb_substr($val, $start, $length, GyroLocale::get_charset());
        }
}

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