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Editorial Team
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Asked: 2026-06-12T07:08:02+00:00

Lets say I have a bit of javascript code that is passed a string

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Lets say I have a bit of javascript code that is passed a string from php containing an entire html page. I write the string to the current document and then alter one of it’s containing elements. Something like this:

<script type="text/javascript">
var foo = <?php echo $html_document;?>;
document.open();
document.write(foo);
document.close();
document.getElementById("some_id_within_html_document").innerHTML = "some stuff";
</script>

This gives me my desired output, everything looks great… except when you view the source of this page. If i wanted to scrape this page later and do the same thing it displays the javascript instead of the html interpreted by the browser. Using this method how could I scrape the desired HTML instead of the javascript generating it? I have already circumvented this issue by processing the string in php instead however I am still curious if it is possible to display the interpreted HTML this way when viewing the source/scraping the page.

Edit:
Great responses across the board, I learned a lot about what is actually going on here and what practices I should stay away from. The simplest solution that would take the least effort in relation to my original problem was given by Justin Wood.

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1 Answer

  1. Editorial Team

    don’t pass your PHP variable into the javascript. Just output the variable itself, then use javascript to edit whatever it is that you want to edit…

    <?php
$html = "<html><head><title></title></head><body><p id='p'>Something</p></body></html>";

echo $html;
?>

<script type="text/javascript">
  document.getElementById("p").innerHTML = "blah";
</script>

    Something like that should work for you.

    NOTE: I have only tested this in chrome, FF, and safari

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