(PECL openal >= 0.1.0)
openal_context_create — Create an audio processing context
openal_context_create ( resource $device ) : resource
device
An Open AL(Device) resource (previously created by openal_device_open()).
Returns an Open AL(Context) resource on success or false on failure.
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https://www.php.net/manual/en/function.openal-context-create.php