What does the error message "Parse error: parse error, unexpected T_LNUMBER, expecting T_VARIABLE or '$'" indicate in PHP code?

The error message "Parse error: parse error, unexpected T_LNUMBER, expecting T_VARIABLE or '$'" indicates that there is a syntax error in the PHP code where a number (T_LNUMBER) is being used where a variable or a dollar sign ($) is expected. To solve this issue, make sure that you are using variables or $ before the number in the appropriate context.

// Incorrect code causing the parse error
$number = 5;
echo 5;

// Corrected code
$number = 5;
echo $number;