What is the error message "Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting ']' in C:\apache\htdocs\web\admin\module\newsl_admin.php on line 103" indicating in the PHP code provided?

The error message "Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting ']' in C:\apache\htdocs\web\admin\module\newsl_admin.php on line 103" indicates that there is a syntax error in the PHP code on line 103. This error often occurs when there is an issue with concatenating strings and variables. To solve this issue, you need to properly concatenate the strings and variables in the code on line 103.

// Incorrect code causing the error
echo "Hello, $name is $age years old";

// Corrected code
echo "Hello, " . $name . " is " . $age . " years old";