Adding (value) to each key on an array!

Question

So I have an array (say $array(1,2,3,4,5)). I need to write a function that will add (say 1) to each element so when I put $array into my "addonefunction" my return value when I print_r(addonefunction(array)) I will get $newarray(2,3,4,5,6). Can anyone guide me in the right direction as to how to do this?

Answer 1 · 2014-09-10T05:06:45Z

September 10, 2014 5:06am

Jose,

The issue lies within the foreach loop, as Shawn stated; your code is getting cut short by having the return statement inside the loop (remember, "return" breaks the loop).

Beyond that, though, if you simply move the "return $value" outside of the foreach, you're still only going to retrieve one value, though this time it will be the last value in the array.

I suggest doing one of the following:

1) Inside your function, create a new array ($newArray), then inside the foreach, for each value, array_push that value into your new array, and then after the foreach, return your new array.

2) Use the & symbol in your foreach declaration, like so:

foreach($arr as &$value) {
//code goes here
}

...the & symbol passes a variable by reference so that it can be modified. Read more here:

http://php.net/manual/en/language.references.pass.php

Whichever method you choose to go with, you still need to move your return statement outside of the foreach loop. Also, make sure you're returning the $arr, not the $value.

Let me know if you need to see some examples for clarification.

Hope this helps!

Erik

Answer 2 · 2014-09-10T04:37:29Z

September 10, 2014 4:37am

Jose,

It sounds like you're looking for the "foreach" loop! Take a look at the documentation found at the following link and see if this will do the trick for you:

http://php.net/manual/en/control-structures.foreach.php

You'll use the foreach loop to iterate each value in your array, and for each iteration, increment the current value by one ($value++).

Hope this helps!

Erik

Answer 3 · 2014-09-10T04:44:31Z

September 10, 2014 4:44am

Hello! Thanks for the quick response. Unfortunately, however, I seem to be missing an important step.... here is what my code looks like:

<?php
function myArrayFunc($arr) {

foreach($arr as $value) {
    $value = $value + 1;
    return $value;
    }

}

$myArray = array(5, 3, 2, 5, 7);
echo "My array looks like:\n";
print_r($myArray);

echo "and if I add one to each of them, it looks like:\n";
print_r(myArrayFunc($myArray));

?>

OUTPUT:

My array looks like: Array ( [0] => 5 [1] => 3 [2] => 2 [3] => 5 [4] => 7 ) and if I add one to each of them, it looks like: 6

Sooo, I am able to print my original array but when I try printing the second one, I simply get 6.

Answer 4 · 2014-09-10T05:31:08Z

September 10, 2014 5:31am

Thank you very much for the help I was able to get this code working d(^.^)b

Answer 5 · 2014-09-10T05:35:32Z

September 10, 2014 5:35am

Sooo.. now I am working on another problem and this one is a little bit more in depth.

My first problem was this creating a function that, when given a date in a certain format, will return it in a defined format. Here is my answer to that:

<?php
function myDateFormatter($dateStr){
    $newDate = date("Y-m-d", strtotime($dateStr));

    return $newDate;
}

$date1 = "May 13, 2007";
echo "The date $date1 formatted with my function is " . myDateFormatter($date1) . "\n";

// The output should look like:
// The date May 13, 2007 formatted with my function is 2007-05-13

// Another example

$date2 = "january 1 2014";
echo "The date $date2 formatted with my function is " . myDateFormatter($date2);

// The output should look like:
// The date january 1 2014 formatted with my function is 2014-01-01

?>

The second problem was the one you guys helped me with.

Now the third problem is this:

<?php
function myDateFormatter($date) {
    // COPY YOUR myDateFormatter() FUNCTION CODE FROM CHALLENGE #1
}

function formatDateArray($dateArray){
    // PUT YOUR NEW CODE HERE!
    // You need to return an array that contains all of the dates in the
    // $dateArray array formatted using the myDateFormatter() function above.
}

/*
DON'T TOUCH THE CODE BELOW
Your output should look like:

My date array looks like:
Array
(
    [0] => may 30th
    [1] => jan 1
    [2] => May 13, 2007
)
and if I format them, it looks like:
Array
(
    [0] => 2014-05-30
    [1] => 2014-01-01
    [2] => 2007-05-13
)
*/
$dateArray = array("may 30th", "jan 1", "May 13, 2007");

echo "My date array looks like:\n";
print_r($dateArray);
echo "and if I format them, it looks like:\n";
print_r( formatDateArray($dateArray) );

Please note that I DO NOT want the answer but a little help in guiding as to how to begin this.... By the looks of if, I assume these problems were designed to build one into the other. Is that a correct assessment?

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Jose De La O Hernandez

Jose De La O Hernandez

Adding (value) to each key on an array!

5 Answers

Erik McClintock

Erik McClintock

Erik McClintock

Erik McClintock

Jose De La O Hernandez

Jose De La O Hernandez

Shawn Gregory

Shawn Gregory

Jose De La O Hernandez

Jose De La O Hernandez

Jose De La O Hernandez

Jose De La O Hernandez