stream_context_set_option

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

stream_context_set_option — Sets an option for a stream/wrapper/context

bool stream_context_set_option ( resource $stream_or_context , string $wrapper , string $option , mixed $value )

bool stream_context_set_option ( resource $stream_or_context , array $options )

Sets an option on the specified context. value is set to option for wrapper

stream_or_context: The stream or context resource to apply the options to.
options: The options to set for stream_or_context.

Note:

options must be an associative array of associative arrays in the format $arr['wrapper']['option'] = $value.

Refer to context options and parameters for a listing of stream options.

Returns TRUE on success or FALSE on failure.

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https://secure.php.net/manual/en/function.stream-context-set-option.php