PHP parses JavaScript content inside heredoc

Question

<?php
$javascript = <<<EOT
<script type="text/javascript">
function test () {
    return 'test test test \n test test test';
}
</script>
EOT;

echo $javascript;
?>

The \n above is parsed as newline by PHP, generates HTML source like the following

    return 'test test test 
 test test test';

and this results in a JavaScript syntax error: unterminated string literal.

I have a big chunk of JavaScript code, so I don't want to wrap them like

$javascript = "<script type=\"text/javascript\">\nfunction test()...\n";

and actually the JavaScript code is not directly echo'd to the page, it is passed to another function, this is why I need a PHP variable.

So how can I define a PHP variable that contains a big chunk of JavaScript code whitout causing problems?

Is there a way like if / endif?

<?php if (condition): ?>
html code...
<?php endif ?>

There's a variable in op code, NOWDOC will skip it. Use output buffering. — u_mulder
– u_mulder, Commented Dec 25, 2014 at 7:05

deceze · Accepted Answer · 2014-12-25 07:12:39Z

8

Option 1: Use a NOWDOC, which is to HEREDOCs as ' single quotes are to " double quotes.

$javascript = <<<'EOT'
   ...\n...
EOT;

Option 2: Escape the special character:

$javascript = <<<EOT
    ...\\n...
EOT;

answered Dec 25, 2014 at 7:12

deceze♦

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Comments

Vinh Nguyen · Accepted Answer · 2015-06-01 10:21:13Z

0

My code:

$javascript = <<<'EOT'
<script type="text/javascript">
$demo = 'test';
alert($demo);
</script>
EOT;
echo $javascript;

If i use 'EOT' then my code in javascript working well, but i use EOT then my code will understand $dem is variable in PHP

answered Jun 1, 2015 at 10:21

Vinh Nguyen

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