Convert comma separated string to array and test for entries
$PermittedCountryCodes = "FR,GB";
$PermittedCountryCodes = trim($PermittedCountryCodes);
$PermittedCountryCodes = strtoupper($PermittedCountryCodes);
$PermittedCountryCodes = explode(',', $PermittedCountryCodes); //Convert to array (No commas will result in the text in the string being in an array of length 1)
$PermittedCountryCodes = array_map('trim', $PermittedCountryCodes); //Trim each array entry
if (array_search("GB", $PermittedCountryCodes) !== False)
{
//'GB' IS PRESENT
}Convert array into comma separated string
$Types = array();
if (something)
$types[] = "SMS";
if (somethingelse)
$Types[] = "TEL";
$Types = implode(',', $Types); //Convert array to comma seperated string
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