PHP Iconv Error: 'Detected an illegal character in input string' - Solution and Explanation

Iconv is a PHP function used to convert a string from one character encoding to another. The error message 'Detected an illegal character in input string' indicates that the input string contains a character incompatible with the specified character encoding.

This error arises when the input string includes characters not supported by the designated encoding. For instance, if the input string contains characters unsupported by the UTF-8 character encoding, you might encounter this error.

To resolve this error, ensure the input string only contains characters supported by the specified character encoding. You might also need to define a different character encoding if the current one doesn't support the characters in the input string.