get value from array with another array index

Question

I'm new to php programming, so sorry for any errors whatsoever.

I have a $monthsKeys variable that contains an array going from 0 to 12. I have another array ($Months) that contains 12 months from December to January.

I'm trying to create a function that takes the array as parameter and gets the key value from $monthsKeys so that it can return the month's name contained in $Months.

function getnomMois($monthsKeys){
    $monthName= array(['Decembre','Novembre','Octobre','Septembre','Aout','Juillet','Juin','Mai','Avril','Mars','Fevrier','Janvier']);
    foreach($monthsKeys as $monthName){
        $monthName[] = $monthKeys['numMois'];
    }
}

What I expect the function to return:

Instead of 12 for the month's number it returns December

What I'm trying to do:

I try to get the key from the $monthsKeys array and use it to get the value from the $MonthName array

What I understand I need to do:

I must extract the key value from the 1rst array and use it to get the value of the 2nd array accordin to the 1rst array key.

ie: monthKey[12] shoudl allow me to return monthName[12]='December'.

$monthName on the second line is array, but on the 4th line you change it to string (when you loop over the values), and then you are trying to do array operation ([]) on that string. — Dekel
– Dekel, Commented Dec 6, 2016 at 15:21
if you get an element of your $monthName array by numbered index; i.e $monthName[0], it will already do what you what it to do. $monthName[0] = 'Decembre' — coderodour
– coderodour, Commented Dec 6, 2016 at 15:23
A few things: 1) Do a simple print_r($monthName); right after you declare it and look at the array structure carefully 2) You always want to make sure you don't overwrite your variables, means you don't want to use $monthName in your foreach loop if you already used it before to define the array with the months name 3) Take a simple approach and start by writing down in pseudo code what exactly you try to do and then start to write the real code — Rizier123
– Rizier123, Commented Dec 6, 2016 at 15:23
What do you expect the function to return? (update the question with the give exact data) — Dekel
– Dekel, Commented Dec 6, 2016 at 15:30

Dekel · Accepted Answer · 2016-12-06 15:26:03Z

1

Here is the explanation of your code (and the problem you had):

function getnomMois($monthsKeys){
    $monthName= array(['Decembre','Novembre','Octobre','Septembre','Aout','Juillet','Juin','Mai','Avril','Mars','Fevrier','Janvier']);
  //^ here $monthName is array
    foreach($monthsKeys as $monthName){
                         //^ here you change $monthName to string
                         //  becasuse you loop over the arrays and put each value
                         //  inside the $monthName variabl
        $monthName[] = $monthKeys['numMois'];
                //^ here are you tring to do array operation,
                //  but the $monthName variable currently is a string (and you can't do that)
    }
}

answered Dec 6, 2016 at 15:26

Dekel

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