Include CSS and JS in PHP based on condition

Question

Is there a way to search the PHP content body while it is being parsed by PHP for certain keywords, so I can include CSS and JS files based on the presence of those keywords before the page is being served?

If PHP would have a variable like $_CONTENT_BODY where it outputs the parsed page into, then I could search for keywords like in this example:

if(stripos($_CONTENT_BODY, 'usetinymce') !== false)) echo '<script type="text/javascript" src="http://a.host.com/js/tinymce/jscripts/tiny_mce/tiny_mce.js"></script>';

Nigel Ren · Accepted Answer · 2017-07-05 09:40:33Z

1

You could use ob_start(); and $text = ob_get_contents();. Just make sure that you process these properly, check out http://php.net/manual/en/book.outcontrol.php.

answered Jul 5, 2017 at 9:40

Nigel Ren

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1 Comment

MrMacvos Over a year ago

Thanks, that's what I was looking for!

Giorgio Catenacci · Accepted Answer · 2017-07-05 09:38:50Z

0

You can get the page itself and parse it.

<?php   
if (!isset($_GET['doNotCallMeAgain']) || $_GET['doNotCallMeAgain'] !== 1) {
    $urltothisfile = 'urltothefilehimself'+'?doNotCallMeAgain=1';
    $result = file_get_contents ($urltothisfile); //in $result you will get your page as html and you can search in it
} ?>

answered Jul 5, 2017 at 9:38

Giorgio Catenacci

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3 Comments

MrMacvos Over a year ago

That suggests the page is completely generated and served. That's not what I want.

Giorgio Catenacci Over a year ago

the page will completely generated and served to the server that asked the page itself, not to the client who asked that. Then you can make your check in here and decide how to serve the page to the original request.

Kustolovic Over a year ago

beware, with file_get_content used like that you loose Session, cookies, headers, post & get, …

Bernhard · Accepted Answer · 2017-07-05 09:39:17Z

0

You can assemble a Variable which you can search and output at the End.

$_CONTENT_BODY  = 'here ';
$_CONTENT_BODY .= 'is some ';
$_CONTENT_BODY .= 'content.';

if(stripos($_CONTENT_BODY, 'some')){
 // do whatever you like
}

answered Jul 5, 2017 at 9:39

Bernhard

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Comments

Kustolovic · Accepted Answer · 2017-07-05 09:44:44Z

0

You can include another php file and get the results with ob_start/ob_get_clean()

ob_start();
include 'myfile.php'; 
$_CONTENT_BODY = ob_get_clean();

But you will encounters some problems, like white pages on some php errors. It is better to build your app more logicaly instead of doing some dirty search & replace.

answered Jul 5, 2017 at 9:44

Kustolovic

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1 Comment

MrMacvos Over a year ago

Now that I've read the manual, in your example it's safer to use $_CONTENT_BODY = ob_get_flush(); which also stops output buffering.

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