Why is the sentence in the middle "Therefore, we can change the code for question 1 just now to:" displayed?

Question

<?php

$shixi = 'Study hard for four years in college<br />';

$buran = 'Otherwise there will be no chance of internship<br />';

$mimang = 'Use others’ time to be confused Get PHP Chinese website<br />';

##$xuexi = 'Learn PHP<br />';

//We can splice all the strings together.

echo $shixi . $buran . $mimang . $xuexi;

?>

So, the question just now is We can change the code to:

<?php

$php = 'PHP Chinese website';

//A space is added in the middle

$str = $php . 'aaaa';

echo $str;

?>

Answer 1

Are your codes all in the same file?