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<?php $course_id = "SW_3200R50S14C"; $matches = array(); preg_match("/[0-9]+/",$course_id, $matches); print_r($matches); $matches = array(); preg_match("R/[0-9]+/",$course_id, $matches); print_r($matches);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 3200 ) Warning: preg_match(): Delimiter must not be alphanumeric, backslash, or NUL in /in/lNERs on line 11 Array ( )

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