(PECL varnish >= 0.3) Ban URLs using a VCL expression

(PECL gearman >= 0.5.0) Run a single low priority task

(No version information available, might only be in Git) Set the idle callback function

(PECL svm >= 0.1.5) Get the sigma value for regression types

(PECL gupnp >= 0.1.0) Retrieves the specified action arguments