(PHP 4 >= 4.3.2, PHP 5, PHP 7, PHP 8)
streamWrapper::stream_open — Opens file or URL
$path,$mode,$options,&$opened_pathThis method is called immediately after the wrapper is initialized (f.e. by fopen() and file_get_contents()).
pathSpecifies the URL that was passed to the original function.
Note:
The URL can be broken apart with parse_url(). Note that only URLs delimited by :// are supported. : and :/ while technically valid URLs, are not.
modeThe mode used to open the file, as detailed for fopen().
Note:
Remember to check if the
modeis valid for thepathrequested.
optionsHolds additional flags set by the streams API. It can hold one or more of the following values OR'd together.
| Flag | Description | 
|---|---|
| STREAM_USE_PATH | If pathis relative, search
            for the resource using the include_path. | 
| STREAM_REPORT_ERRORS | If this flag is set, you are responsible for raising errors using trigger_error() during opening of the stream. If this flag is not set, you should not raise any errors. | 
opened_path
       If the path is opened successfully,
       and STREAM_USE_PATH is set in options,
       opened_path should be set to the full
       path of the file/resource that was actually opened.
      
   Returns true on success or false on failure.
  
Emits
E_WARNING if call to this method fails
(i.e. not implemented).
Note:
The streamWrapper::$context property is updated if a valid context is passed to the caller function.
