php Array storing key from a foreach loop into string

Question

I have a key-pair array like this

$option['33']="Steak Doness";
$option['34']="Size";
$option['35']="Cooking Method";

I want to store the keys into a string like this

$key="33,34,35,";

I try to use foreach loop

$key="";

foreach($option as $key => $value) {
    $key=$key.",";
}
echo $key;

However, my output is

35,

May i know which part went wrong?

just try echo $key = implode(",", array_keys($option)).

Murad Hasan
– Murad Hasan

2016-09-29 11:21:06 +00:00
Commented Sep 29, 2016 at 11:21 — Murad Hasan
– Murad Hasan, Commented Sep 29, 2016 at 11:21

Murad Hasan · Accepted Answer · 2016-09-29 11:27:59Z

1

You miss use the $key in your script.

The problem is with the $key which is in the foreach loop.... In each time your $key variable updated with the loop... Try with difference variable in your script.

OR, simply use

echo $key = implode(",", array_keys($option));

answered Sep 29, 2016 at 11:27

Murad Hasan

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1 Comment

MonkeyZeus Over a year ago

Technically echo $key = implode(",", array_keys($option)).','; if you want to produce the exact output OP is showing.

Pratik Bhalodiya · Accepted Answer · 2016-09-29 11:33:29Z

0

1st change your varible $key to $keys replace one line

$key=$key.",";

to

$keys .= $key . ",";

it will work 100%

edited Sep 29, 2016 at 11:33

answered Sep 29, 2016 at 11:24

Pratik Bhalodiya

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6 Comments

Murad Hasan Over a year ago

what is the logic of these?? If i add the key each time and store in the same variable then is there anything wrong?? **The problem is with the $key which is in the foreach loop...

Pratik Bhalodiya Over a year ago

you are re-assigning $key every time but you need to concat it so :)

Murad Hasan Over a year ago

You misunderstood, Just take a look.. there are 2 $key, One is in the foreach loop and another is to store the keys..

gosulove Over a year ago

your coding its not working. plz check. Frayne's one is working

Pratik Bhalodiya Over a year ago

@FrayneKonok used implode function that will produce output like 33,34,35 not like 33,34,35,

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