php - Passing NULL values into mysql Stored procedure -

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i trying pass few null values stroed procedure php retains varaibles empty strings '' , not null.

my db insert function looks this. (i using framework , adodb if looks weird thats why).

function insert_emp($f_name, $last_name, $dob) {     if(!isset($dob)){       $dob = null;    }     $this->db->setconnection("call insert_emp('$f_name', '$l_name', '$dob')"); }

i have ensured $dob being passed empty string ''. reason when calls stored proc not changed null. dob datetime field , mysql complains can not enter empty string datetime. if hard code insert such this

 $this->db->setconnection("call insert_emp('test1', 'test2', 'null')");

it work. help.

null cannot represented string. should use string literal null.

function insert_emp($f_name, $last_name, $dob = 'null') {    $this->db->setconnection("call insert_emp('$f_name', '$l_name', '$dob')"); }

i have set default value, , should wanted in first place.


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