php_user_filter::onCreate
(PHP 5, PHP 7)
php_user_filter::onCreate — Called when creating the filter
说明
public php_user_filter::onCreate
( void
) : bool
This method is called during instantiation of the filter class object. If your filter allocates or initializes any other resources (such as a buffer), this is the place to do it.
When your filter is first instantiated, and yourfilter->onCreate() is called, a number of properties will be available as shown in the table below.
| Property | Contents |
|---|---|
| FilterClass->filtername | A string containing the name the filter was instantiated with. Filters may be registered under multiple names or under wildcards. Use this property to determine which name was used. |
| FilterClass->params |
The contents of the params parameter passed
to stream_filter_append()
or stream_filter_prepend().
|
| FilterClass->stream |
The stream resource being filtered. Maybe available only during
filter() calls when the
closing parameter is set to FALSE.
|
参数
此函数没有参数。
返回值
Your implementation of
this method should return FALSE on failure, or TRUE on success.