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<?php $f = get_defined_functions(); $funcs = $f['internal']; print_r(array_slice($funcs, 0, 10));
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => zend_version [1] => func_num_args [2] => func_get_arg [3] => func_get_args [4] => strlen [5] => strcmp [6] => strncmp [7] => strcasecmp [8] => strncasecmp [9] => error_reporting )

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