重置PHP函数

Question

I have a function which I have to loop it a few times but I'm getting an error of Cannot redeclare function(), is it not possible to loop a function like this, or is it just a problem in my function,

Thanks for your help.

while($i=0){
function gbFunc1($elem){ return (string)$elem['companyCode'][0]; }
    function gbFunc2($elem){ return (string)$elem['locationType'][0][0]->locationDescription->name; }
    function gbFunc3($elem){ return (string)$elem['vehicleRentalPrefType'][0]; }
    function gbFunc4($elem){ return (string)$elem['customerReferenceInfo'][0]->referenceQualifier; }
    function gbFunc5($elem){ return (string)$elem['customerReferenceInfo'][0]->referenceNumber; }
    function vFunc3($elem){ return (float)$elem['rateAmount'][0][1]->rateAmount; }

    $new = Fx::GroupBy($results_array, array('func:gbFunc1', 'func:gbFunc2', 'func:gbFunc3', 'func:gbFunc4', 'func:gbFunc5'), array(null, null, null, null, 'func:vFunc3',));
}

Answer 1

You need to declare your functions outside of the loop, otherwise each time the loop iterates it will re-declare the functions again.

function gbFunc1($elem){ return (string)$elem['companyCode'][0]; }
function gbFunc2($elem){ return (string)$elem['locationType'][0][0]->locationDescription->name; }
function gbFunc3($elem){ return (string)$elem['vehicleRentalPrefType'][0]; }
function gbFunc4($elem){ return (string)$elem['customerReferenceInfo'][0]->referenceQualifier; }
function gbFunc5($elem){ return (string)$elem['customerReferenceInfo'][0]->referenceNumber; }
function vFunc3($elem){ return (float)$elem['rateAmount'][0][1]->rateAmount; }

while($i=0){
    $gbF1 = gbFunc1($elem);
    $gbF2 = gbFunc2($elem);
    $gbF3 = gbFunc3($elem);
    $gbF4 = gbFunc4($elem);
    $gbF5 = gbFunc5($elem);
    $vF3 = vFunc3($elem);


    $new = Fx::GroupBy($results_array, array($gbF1, $gbF2, $gbF3, $gbF4, $gbF5), array(null, null, null, null, $vF3,));
}