JuniorTheoryCommon

What happens when you run this program?

PHP

<?php

echo "start\n";
echo "middle\n"
echo "end\n";

Nothing: a parse error, the file never runs

Expecting the lines above the broken one to print: PHP parses the whole file before running it, so after a parse error not even start appears.
Expecting a line break to end a statement: in PHP only ; ends one, so line 4 runs into the echo on line 5 and the file cannot be parsed.

Which line does PHP name in this error message, and why is it not line 4?
How does a parse error differ from a Fatal error such as an undefined constant?

JuniorTheoryCommon

PHP

<?php

echo "start\n";
echo "middle\n"
echo "end\n";

Nothing: a parse error, the file never runs

Expecting the lines above the broken one to print: PHP parses the whole file before running it, so after a parse error not even start appears.
Expecting a line break to end a statement: in PHP only ; ends one, so line 4 runs into the echo on line 5 and the file cannot be parsed.

Which line does PHP name in this error message, and why is it not line 4?
How does a parse error differ from a Fatal error such as an undefined constant?