* 转换编码 | 传入参 | 参数标识 | | 说明 | | --- | --- | --- |--- | | str | 0 | 必填 | 字符串 | | to | 1 | 选填 | 转换前编码 | | from | 2 | 选填 | 转换后编码 | | 回调参 | 说明 | | --- | --- | | \[ string \] | 处理完字符串 | * 案例 ~~~ $obj = $T_C->convertEncoding('中文123abc'); ~~~ > 中文123abc