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Tidily embedding JS into PHP

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Jan 22.2008

Hi all,

A simple way to embed JS into PHP is the following:
<?php
$a = 5;
echo “<html>n”;
echo “<body>n”;
echo “<script language=javascript>n”;
echo “document.write($a);n”;
echo “</script>n”;
echo “</body>n”;
echo “</html>n”;
?>

I’m looking for a ‘tidier’ way to do this. For instance, a way in which command ‘echo’ is not repeated so many times…

Comments welcome.

Ruben

to post a comment
PHP

7 Comments(s) ↴

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@TJ111Jan 22.2008 — Use HEREDOC syntax.
[code=php]
$a = 5;
echo <<<EndHTML;
<html>
<body>
<script type="text/javascript">
document.write($a);
</script>
</body>
</html>
EndHTML;
[/code]
You can use whatever word you want for "EndHTML", just make sure it doesn't appear in the string itself, and that it appears on its own line with no indentation.
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@rvazquezauthorJan 22.2008 — Thanks for your answer ?

But, this use of command echo doesn't work in my server... have you got any idea on why?

Ruben
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@TJ111Jan 22.2008 — You might need to store it in a variable, then echo the variable.
[code=php]
$a = 5;
$html = <<<EndHTML;
<html>
<body>
<script type="text/javascript">
document.write($a);
</script>
</body>
</html>
EndHTML;
echo $html;[/code]
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@MrCoderJan 22.2008 — [code=php]
<?php
ob_start();
?>
// All my javascript here
document.write(<?php echo $a; ?>);
// End of my javascript
<?php
$javascript = ob_get_clean();
?>

<html>
<body>
<script type="text/javascript">
<?php echo $javascript; ?>
</script>
</body>
</html>

[/code]
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@rvazquezauthorJan 23.2008 — Any idea on why this variable initialization works:

<?php

ob_start();

$a = 5;

?>

and this one doesn't work:

<?php

ob_start();

$a = "Hello world!";

?>

Ruben
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@rvazquezauthorJan 23.2008 — In other words...

This works:

// All my javascript here

document.write(<?php echo 5; ?>);

// End of my javascript

This doesn't work:

// All my javascript here

document.write(<?php echo "Hello World"; ?>);

// End of my javascript

Ruben
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@MrCoderJan 23.2008 — <i>
</i>This doesn't work:
// All my javascript here
document.write('&lt;?php echo "Hello World"; ?&gt;');
// End of my javascript
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