Putting php inside an echo php shortcode

Question

I am using wordpress. I am using the plugin social locker.

I have figured out how to display the shortcode via PHP:

<?php echo do_shortcode('[sociallocker id="3071"] My content Here [/sociallocker]'); ?>

However I want to display this button that will allow for a print popup in between there.

This code is:

<?php if ( function_exists( 'pdf_print_popup' ) ) pdf_print_popup(); ?>

So my question is can I do this:

<?php echo do_shortcode('[sociallocker id="3071"] <?php if ( function_exists( 'pdf_print_popup' ) ) pdf_print_popup(); ?> [/sociallocker]'); ?>

If not what do I need to do? My goal is to make it so the social locker dissapears once the user shares and they see the print button.

Thanks Guys :)

Answer 1

You're close but not quite.

do_shortcode expects a string so give it one!

---

If function() returns a string you can

echo do_shortcode( '[shortcode]' . function() . '[/shortcode]' );

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If function() directly outputs, you can capture its output using output buffering

//start the buffer
ob_start();

function();  //i.e pdf_print_popup();

//store out output buffer
$string = ob_get_contents();

//clear the buffer and close it
ob_end_clean();

and then use the string we stored

echo do_shortcode( '[shortcode]' . $string . '[/shortcode]' );