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Editorial Team
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Asked: 2026-05-26T00:12:45+00:00

Rewrote the entire question because evidently it was too vague I have HTML, this

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Rewrote the entire question because evidently it was too vague

I have HTML, this HTML needs to be processed by Javascript before I send it through E-mail.

In other words, I need to run Javascript on HTML during PHP runtime.

(Fake) example to illustrate my point:

<?
$html = run_js_html($input,'myscript.js');
mail('target@email.com','Subject',$html);
?>

$input contains the input HTML
myscript.js contains some JS functionality
run_js_html should be a function that runs the script on the html, and then returns the new HTML after javascript.

Is this possible? One way I thought maybe could work is do some kind of HttpRequest through PHP to a PHP file that includes the input HTML and runs the Javascript on it.

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1 Answer

  1. Editorial Team

    Step number 3, if you insist in using jQuery, has to be done on the client side unless you are using server-side JavaScript, which you’re not, judging from the PHP tag.

    Your options are:

    1. Have a client (for example, the person sending the email) execute the JavaScript. You could do this in a hidden iframe if you don’t want it to be visible. On the other hand, you might want to make this a feature: Before sending, show the user a preview pane. The submit button could be used to submit the final HTML (after jQuery’s manipulation).
    2. Install graphical web browser with JavaScript capabilities on the server and capture the output. Probably to much trouble for something like this.
    3. Dump jQuery for this purpose and see if you can use PHP’s DOMDocument. phpquery abstracts a lot away and has a syntax similar to jQuery.

    But do you really want to do this? Couldn’t you do something like this?

    function send_some_email()
{
    ob_start();
    include("my_email.php");
    $content = ob_get_clean();
}
// file my_email.php:
<?php 
    $size = 3;
    $length = strlen($title);
    if($length > 50)
        $size = 1;
    elseif($length > 30)
        $size = 2;
?>
<body>
    <?php echo sprintf('<font size="%d">%s</font>', $size, $title); ?>
    <br>
    Hello World.
</body>

    While judging a string’s length by the number of characters is not very reliable, it is an easy implementation. You can also compute the approximate length of the string by:

    1. Make or find a function that takes into account letters like ‘i’ (not wide) and ‘M’ (wide).
    2. Calculate the width of a string with imagettfbbox().
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