php怎么将中文转utf-8编码

string iconv ( string $in_charset , string $out_charset , string $str )

$str = "中文字符串";$str = iconv("GBK", "UTF-8", $str);echo $str;

function convert_to_utf8($data) {    if (is_array($data)) {        foreach ($data as &$value) {            $value = convert_to_utf8($value);        }        unset($value);    } elseif (is_object($data)) {        foreach ($data as &$value) {            $value = convert_to_utf8($value);        }        unset($value);    } elseif (is_string($data)) {        $data = iconv('GBK', 'UTF-8', $data);    }    return $data;}

$array = array('name' => '张三', 'age' => '18');$array_utf8 = convert_to_utf8($array);print_r($array_utf8);

Array(    [name] => 张三    [age] => 18)

$str = '中文文本';$str = @iconv("GBK", "UTF-8//IGNORE", $str);