(PECL openal >= 0.1.0)
openal_context_current — Make the specified context current
openal_context_current ( resource $context ) : bool
context
An Open AL(Context) resource (previously created by openal_context_create()).
 Returns true on success or false on failure. 
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    https://www.php.net/manual/en/function.openal-context-current.php