string_natural_compare_function  156 ext/standard/array.c 			ARRAYG(compare_func) = sort_type & PHP_SORT_FLAG_CASE ? string_natural_case_compare_function : string_natural_compare_function;
string_natural_compare_function  147 ext/standard/php_string.h PHPAPI int string_natural_compare_function(zval *result, zval *op1, zval *op2 TSRMLS_DC);