php的array_chunk源码中模除的巧妙用法

array.c

/* If reached the chunk size, add it to the result array, and reset the                                                               
 * pointer. */                                                                                                                        
if (!(++current % size)) {                                                                                             
    add_next_index_zval(return_value, chunk);                                                                                         
    chunk = NULL;                                                                                                                     
}