how to remove the name in email id

Question

I have some email formats like

 iba@test.co - Admin,iwi@test.co - Kika,mla@test.co - Mka,

I need to send the email in php for multiple id's now due to above name its sees to error

Expected output

 iba@test.co,iwi@test.co,mla@test.co,

I need to remove the name after the all mail id how can i do that i have tried str_replace but thats not gives me a solution.

How can i use preg_match in this case ?

Answer 1

Reg Exp

$list = 'iba@test.co - Admin,iwi@test.co - Kika,mla@test.co - Mka,';
$str = preg_replace('/'.preg_quote('-') .'.*?'.preg_quote(',') . '/', ',', $list);

Rtrim To remove the end comma

$str = rtrim($str, ',');