I have an array:
$arr['alpha'] = 'a';
$arr['beta'] = 'b';
$arr['delta'] = 'd';
Does anyone know if PHP has a function to take the above array and produce:
$some_string -- where $some_sting is set to the associative values of the array such that if I echoed $some_sting I would see:
"a,b,d"
Thanks.
I know how to write a for loop to produce the result, but I am curious if there is a simple function that already does this.
You can use implode()
Update:
About your comment under FreekOne's answer you wrote:
Ok, the answers herein are correct, but actually I stated the wrong outcome I am looking for. I actually want to yield "alpha,beta,delta". Is that possible?
This is how you do that..
<?php
function implode_key($glue = "", $pieces = array()) {
$arrK = array_keys($pieces);
return implode($glue, $arrK);
}
?>
$some_string = implode(',',$arr); //a,b,d
$some_string = implode(',',array_keys($arr)); //alpha,beta,delta
Use PHP's implode function:
http://php.net/manual/en/function.implode.php
Prototype:
string implode ( string $glue , array $pieces )
So you could do this:
$glued = implode(',' , $arr);
For the sake of variety, join() can also be used, but it's nothing more than an alias of the already suggested implode().
So, doing an echo join(',',$arr); would output a,b,c as well.
implode() vs explode() makes sense to me, but join() vs explode() ?? (since there ain't an unjoin() function or something like that..).. I know.. slightly offtopic.join() because it's shorter, I guess, although the difference is obviously negligible.
join is split, like in the Python camp. As nice as it is to accommodate for varying backgrounds, I agree that consistency is probably better - and don't detach this statement from the current context.
array_keysto get an array of the keys, and then implode that.