(PHP 4 >= 4.3.0, PHP 5)
stream_context_set_params — Set parameters for a stream/wrapper/context
Sets parameters on the specified context.
The stream or context to apply the parameters too.
An array of parameters to set.
Note:
params should be an associative array of the structure: $params['paramname'] = "paramvalue";.
成功时返回 TRUE, 或者在失败时返回 FALSE.