Does anyone know where to find meaning of php sytax errors?

For ex:
Parse error: syntax error, unexpected T_ENCAPSED_AND_WHITESPACE, expecting T_STRING or T_VARIABLE or T_NUM_STRING

What does T_ENCAPSED_AND_WHITESPACE mean?

This error is usually trigerred when you use an array syntax into a string
like

PHP Code:

echo "Thank You $row['first_name'] $row['last_name'] for registering with the username $row['username'] and password $row['password']"; 


use the paragraphs characters between the arrays, in that case

PHP Code:

echo "Thank You {$row['first_name']} {$row['last_name']} for registering with the username {$row['username']} and password {$row['password']}"; 


those are hints to the php engine, to know where is the variable to insert and where is the string.

thank you for your reply, is there any guide that shows all the sytax error message definitions?

Not that I know of, no...

I believe those are the codes to internal php constants, but I might be wrong