PHP: Heredoc
You can use a special syntax called heredoc to define strings in PHP. After the <<< operator, you need to specify an identifier with whatever name you like then a line feed, followed by the string itself. The same identifier is added at the end, closing the insertion. This method is convenient for specifying long strings, containing both line feeds and multi-type quotes.
<?php
$str = <<<EOT
Example of a string,
covering several lines,
using heredoc syntax.
Here we don't need to escape either single ', or double " quotes.
EOT;
print_r($str);
Example of a string, covering several lines, using heredoc syntax. Here we don't need to escape either single ', or double " quotes.
Note that the trailing identifier (in this case EOT) must not have spaces, otherwise PHP will tell you off for having a syntax error.
Instructions
Write the text below to the $str variable. Use heredoc syntax.
Lannister, Targaryen, Baratheon, Stark, Tyrell... they're all just spokes on a wheel.
This one's on top, then that one's on top, and on and on it spins, crushing those on the ground.
Tips
The exercise doesn't pass checking. What to do? 😶
If you've reached a deadlock it's time to ask your question in the «Discussions». How ask a question correctly:
- Be sure to attach the test output, without it it's almost impossible to figure out what went wrong, even if you show your code. It's complicated for developers to execute code in their heads, but having a mistake before their eyes most probably will be helpful.
In my environment the code works, but not here 🤨
Tests are designed so that they test the solution in different ways and against different data. Often the solution works with one kind of input data but doesn't work with others. Check the «Tests» tab to figure this out, you can find hints at the error output.
My code is different from the teacher's one 🤔
It's fine. 🙆 One task in programming can be solved in many different ways. If your code passed all tests, it complies with the task conditions.
In some rare cases, the solution may be adjusted to the tests, but this can be seen immediately.
I've read the lessons but nothing is clear 🙄
It's hard to make educational materials that will suit everyone. We do our best but there is always something to improve. If you see a material that is not clear to you, describe the problem in “Discussions”. It will be great if you'll write unclear points in the question form. Usually, we need a few days for corrections.
By the way, you can participate in courses improvement. There is a link below to the lessons course code which you can edit right in your browser.
Your exercise will be checked with these tests:
1<?php // phpcs:ignore PSR1.Files.SideEffects
2
3namespace HexletBasics\Variables\Heredoc;
4
5use PHPUnit\Framework\TestCase;
6
7\HexletBasics\Functions\runScript();
8
9class Test extends TestCase
10{
11 public function test()
12 {
13 $expected = <<<EOT
14Lannister, Targaryen, Baratheon, Stark, Tyrell... they're all just spokes on a wheel.
15This one's on top, then that one's on top, and on and on it spins, crushing those on the ground.
16EOT;
17 $this->expectOutputString($expected);
18 require 'index.php';
19 }
20}
21Teacher's solution will be available in:
