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<?php class A { public static function b ($id) { static $mandateCache = array(); if (array_key_exists($id, $mandateCache)) { $mandate = $mandateCache[$id]; } else { print 'Fetching id ' . $id . "\n"; $mandateCache[$id] = $mandate; } } } A::b(1); A::b(1); A::b(2); A::b(1); A::b(2); A::b(1);
Output for git.master, git.master_jit, rfc.property-hooks
Fetching id 1 Warning: Undefined variable $mandate in /in/DQVFP on line 10 Fetching id 2 Warning: Undefined variable $mandate in /in/DQVFP on line 10

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