php - How to multiply two arrays of different length? -

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I have two lines of different length: 

  $ a = array (10, 20, 30, 40, 50); $ B = array (1, 2, 3);   
 I want to multiply them (like  $ c = array_mult ($ a, $ b) ), that little serial is repeated  $ C  should be  10, 40, 90, 40, 100  to:  
  10 * 1 = 10 20 * 2 = 40 30 * 3 = 90 40 * 1 = 40 50 * 2 = 100   
 Is there an inherent function in PHP to accomplish this task? How can I solve this problem efficiently?  
  
 
 
 There is no built-in function to do this; you can call it a  foreach  and Modules can be done easily with the operator, however:  
  $ c = array (); $ Lane = count ($ B); Forex Currency ($ one $ key = & gt; $ value) {$ c [$ key] = $ value * $ b [($ key% $ lane]]; }

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