Find Array Key

[petenaylor]

Hi all

 

I have a function below that searches an array and assigns it to $totalmonthlycost.

 

I need to know how I get the array key of the chosen array value ($m12 - $m60)

 

How do I return the array key in the below code?

 

$monthvalues = array($m12,$m18,$m24,$m30,$m36,$m42,$m48,$m54,$m60);
function closest($monthvalues, $number){
#does the array already contain the number?
if($i = array_search( $number, $monthvalues)) return $i;
#add the number to the array
$monthvalues[] = $number;
#sort and refind the number
sort($monthvalues);
$i = array_search($number, $monthvalues);
#check if there is a number above it
if($i && isset($monthvalues[$i-1])) return $monthvalues[$i-1];
//alternatively you could return the number itself here, or below it depending on your requirements
}
$totalmonthlycost = closest($monthvalues, $idealcostpermonth);

 

Thanks for your help.

 

Pete

[Muddy_Funster]

I don't get your question - array_search(), which you are already using, returns the key if it finds a match, which is what you seem to be asking how to do. I'm confused.

[petenaylor]

Hi there

 

Yes that's correct I just need to echo out the array key itself.

[Muddy_Funster]

so

if(array_search($array)){
$value = array_search($array);
}
else{
$value = "value not found";
}
echo $value;

[petenaylor]

Thanks, can you help with the function I posted? I need it to output the array key as well as the value.

 

for instance, if it chose $m18 then I want to to show $m18.

[Jessica]

You're not currently echo'ing anything. If you have the key just echo it. 

[Muddy_Funster]

you could try changing your returns to

return array($i, $monthvalues);

then just call the values from the function :

$values = closest($monthvalues, $number);
echo "{$values['1']} was found at position {$values['0']}";

or something along those lines should do it.

[petenaylor]

Sorted! Thanks for your help folks!