CODEWITHSUNDEEP
phparraysmultidimensional-arrayshuffle
Dragos Becsan
Dragos Becsan

Reputation: 75

Cannot shuffle an array inside an array PHP

Basically my problem is that i cannot shuffle an array that is inside another array. To be more specific i want to shuffle the array that is the value of 'Variante de raspuns:':

$intrebari=array(

    array('Enunt:'=>'2+2=','Variante de raspuns:'=>array(2,5,6,4),'Raspuns corect:'=>4,'Punctaj obtinut:'=>'25p'),

    array('Enunt:'=>'2*2=','Variante de raspuns:'=>array(3,4,8,1),'Raspuns corect:'=>4,'Punctaj obtinut:'=>'25p'),

    array('Enunt:'=>'2/2=','Variante de raspuns:'=>array(1,3,4,8),'Raspuns corect:'=>1,'Punctaj obtinut:'=>'25p'),

    array('Enunt:'=>'2-2=','Variante de raspuns:'=>array(2,3,0,4),'Raspuns corect:'=>0,'Punctaj obtinut:'=>'25p')

);

The function i thought of is:

function amestecVariante(&$array){ 
    foreach($array as $intrebare){
        foreach($intrebare as $k=>$v)
           if($k=='Variante de raspuns:')   
            shuffle($v);}
}

For now i only want to display the array with the shuffled 'Variante de raspuns:'. I have another function to display it so it goes something like this in the end:

amestecVariante($intrebari);
afisare($intrebari);

The problem is that the 'Variante de raspuns' array is not shuffled and it's displayed as it is initially. Also i really want to understand why my function doesn't work, i'm not looking for another solution unless mine is no good at all. Thank you in advance.

Upvotes: 0

Views: 117

Answers (1)

raina77ow
raina77ow

Reputation: 106385

Do this instead:

function amestecVariante(&$array){ 
    foreach($array as &$intrebare){
        shuffle($intrebare['Variante de raspuns:']);
    }
}

Demo.

You don't have to iterate over the inner arrays - you just access the array to be shuffled directly (by key). But you do need to make PHP understand that you will modify this array within foreach - that's what reference in &$intrebare is for.

Upvotes: 3

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