How can the error "Parse error: syntax error, unexpected T_STRING in C" be resolved in PHP code?

The error "Parse error: syntax error, unexpected T_STRING in C" typically occurs when there is a syntax error in the PHP code, often due to a missing or misplaced quotation mark. To resolve this issue, carefully review the code and ensure that all strings are properly enclosed in quotation marks.

// Incorrect code causing the error
echo Hello World!;

// Corrected code
echo "Hello World!";