PHP Interview Questions and answers

“heredoc” syntax can be used to declare complex strings,

What will out put the following code snippet?

<?php
$who = "questions";
echo <<<TEXT
So I said, "php interview $who"
TEXT;
?>

Answer – So I said, “php interview questions”

In general, the functionality of this heredoc syntax is similar to double quotes.

Basically there are 2 methods how we can define strings,
- Simple strings
- Complex strings

In a php interview, even a well experienced php programmer might forget how this works,
For an example,
a) echo “Hello $what\n”;
b) echo ‘Hello $what\n’;
$what = “World”;

Which will print correctly in to the browser as “Hello World” followed by a new line.
Is it a) or b) ?

The answer is “a”. That is because simple string will print almost all characters literally, where complex string allows special escape sequences to insert special characters.