PHP生成图片文字报错“imagettftext(): any2eucjp(): invalid code in input string”解决办法

javascripttypescripthtmlcssshellpythongolangjavacc++c#phprubyswiftkotlinscalarustdartelixirhaskellluaperlrsql

mb_convert_encoding ('string', 'HTML-ENTITIES', 'UTF-8');

javascripttypescripthtmlcssshellpythongolangjavacc++c#phprubyswiftkotlinscalarustdartelixirhaskellluaperlrsql

	function to_entities($string){
        $len = strlen($string);
        $buf = "";
        for($i = 0; $i < $len; $i++){
            if (ord($string[$i]) <= 127){
                $buf .= $string[$i];
            } else if (ord ($string[$i]) <192){
                //unexpected 2nd, 3rd or 4th byte
                $buf .= "&#xfffd";
            } else if (ord ($string[$i]) <224){
                //first byte of 2-byte seq
                $buf .= sprintf("&#%d;",
                    ((ord($string[$i + 0]) & 31) << 6) +
                    (ord($string[$i + 1]) & 63)
                );
                $i += 1;
            } else if (ord ($string[$i]) <240){
                //first byte of 3-byte seq
                $buf .= sprintf("&#%d;",
                    ((ord($string[$i + 0]) & 15) << 12) +
                    ((ord($string[$i + 1]) & 63) << 6) +
                    (ord($string[$i + 2]) & 63)
                );
                $i += 2;
            } else {
                //first byte of 4-byte seq
                $buf .= sprintf("&#%d;",
                    ((ord($string[$i + 0]) & 7) << 18) +
                    ((ord($string[$i + 1]) & 63) << 12) +
                    ((ord($string[$i + 2]) & 63) << 6) +
                    (ord($string[$i + 3]) & 63)
                );
                $i += 3;
            }
        }
        return $buf;
    }