What are common issues encountered when converting character encoding in PHP, specifically from UTF-8 to ISO-8859-15?

Common issues encountered when converting character encoding from UTF-8 to ISO-8859-15 in PHP include loss of characters that are not supported in the target encoding, such as special characters or emojis. To solve this issue, you can use the `iconv()` function in PHP to perform the conversion while handling any characters that cannot be converted gracefully.

// Convert UTF-8 string to ISO-8859-15 encoding handling errors gracefully
$utf8String = "Hello, Café ☕";
$isoString = iconv("UTF-8", "ISO-8859-15//TRANSLIT", $utf8String);

echo $isoString;