How can the error "Parse error: parse error, expecting `T_STRING' or `T_VARIABLE' or `T_NUM_STRING'" be resolved in PHP code?

The error "Parse error: parse error, expecting `T_STRING' or `T_VARIABLE' or `T_NUM_STRING'" typically occurs when there is a syntax error in the PHP code, such as missing quotes around a string or variable. To resolve this issue, carefully check the code for any missing or misplaced quotes, variables, or strings.

// Incorrect code causing the parse error
$variable = Hello World!;

// Corrected code with quotes around the string
$variable = 'Hello World!';