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<?php $f = get_defined_functions(); $funcs = $f['internal']; print_r(array_slice($funcs, 0, 50));
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 [10] => define [11] => defined [12] => get_class [13] => get_called_class [14] => get_parent_class [15] => is_subclass_of [16] => is_a [17] => get_class_vars [18] => get_object_vars [19] => get_mangled_object_vars [20] => get_class_methods [21] => method_exists [22] => property_exists [23] => class_exists [24] => interface_exists [25] => trait_exists [26] => enum_exists [27] => function_exists [28] => class_alias [29] => get_included_files [30] => get_required_files [31] => trigger_error [32] => user_error [33] => set_error_handler [34] => restore_error_handler [35] => set_exception_handler [36] => restore_exception_handler [37] => get_declared_classes [38] => get_declared_traits [39] => get_declared_interfaces [40] => get_defined_functions [41] => get_defined_vars [42] => get_resource_type [43] => get_resource_id [44] => get_resources [45] => get_loaded_extensions [46] => get_defined_constants [47] => debug_backtrace [48] => debug_print_backtrace [49] => extension_loaded )

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