Got error like this (Php & mysql) -


This is my SQL function 

  Returns the return return function (value int, member) INT return (value * member); End;   
 And this is my php code  
  $ res1 = "call return value ('$ cost', '$ team_member')"; $ Rs1 = mysqli_query ($ con, $ res1); $ Row1 = mysqli_fetch_array ($ rs1);   
 And then I get an error  
 
 'Warning: mysqli_fetch_array () parameter 1 is expected to be mysqli_result, given in boolean' $ row1. .. Line   
 I do not know what is wrong. According to Pls help   
 
 
  
 
 returns FALSE on failure.   
 You can try the following to check the cause of the failure  
  $ res1 = "call return value ('$ cost', ' $ Team_member ') "; $ Rs1 = mysqli_query ($ con, $ res1); If ($ rs1 === incorrect) {printf ("error:% s \ n", $ mysqli-> error); Die (); } $ Row1 = mysqli_fetch_array ($ rs1);

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