Basic plugin development help

  • Resolved PeVo

    (@pevo)


    12 years, 6 months ago

    Hi there,

    I’m new to wordpress development (obviously) and am having issues trying to get a very simple plugin up and running. The idea is that it takes a url from an anchor and adds images to particular file types:

    <?
/*
        Plugin Name: Add Document Type Styles
        Plugin URI: http://robospeare.com/wordpress/plugin_doctypes
        Description: Detects URLs in your post and page contet and applies style
        to those that link to documents so as to identify the document type. Support
        for .pdf and .mp3
        Version: 1.0
        Author: Oliver Sneyd
        Author URI: http://robospeare.com
*/

function documenttypestyles_regex( $text )
{
        $text = ereg_replace(
                'href=([\'|"][:alnum:]|[:punct:]]*)
                        \.(pdf|mp3) ([\'|"])',
                'herf=\\1.\\2\\3 class="link \\2"',
                $text);

        return $text;
}

function documenttypestyles_styles()
{
        echo "<style>";
        echo ".link { background-repeat : no-repeat; padding : 2px 0 2px 20px; }\n";
        echo ".pdf { background-image: url('" . WP_PLUGIN_URL . "/documenttypestyles/pdfIcon.jpg'); }\n";
        echo ".mp3 { background-image: url('" . WP_PLUGIN_URL . "/documenttypestyles/mp3Icon.gif'); }\n";
        echo "</style>\n\n";
}

add_filter( 'the_content', 'documenttypestyles_regex' );
add_action( 'wp_head', 'documenttypestyles_styles' );
?>

    But if I have anything in the documenttypestyles_styles function the header for every page gets messed up – this is displayed at the top of every page:

    “; echo “.link { background-repeat : no-repeat; padding : 2px 0 2px 20px; }\n”; echo “.pdf { background-image: url(‘” . WP_PLUGIN_URL . “/documenttypestyles/pdfIcon.jpg’); }\n”; echo “.mp3 { background-image: url(‘” . WP_PLUGIN_URL . “/documenttypestyles/mp3Icon.gif’); }\n”; echo “\n\n”; } add_action( ‘wp_head’, ‘documenttypestyles_styles’ ); ?>

    Any ideas what I’m doing wrong here?

Viewing 4 replies - 1 through 4 (of 4 total)
  • Big Bagel

    (@big-bagel)

    12 years, 6 months ago

    It looks like it’s not interpreting the double quotes correctly. Make sure whatever you’re using to write the code isn’t saving those as smart-quotes (or whatever they’re called). Since there’s only a little actual php in that function, you could try bypassing the problem all together:

    function documenttypestyles_styles() {
?>
    <style type='text/css'>
    .link { background-repeat : no-repeat; padding : 2px 0 2px 20px; }
    .pdf { background-image: url('<?php echo WP_PLUGIN_URL; ?>/documenttypestyles/pdfIcon.jpg'); }
    .mp3 { background-image: url('<?php echo WP_PLUGIN_URL; ?>/documenttypestyles/mp3Icon.gif'); }
    </style>
<?php
}
    Thread Starter PeVo

    (@pevo)

    12 years, 6 months ago

    Fantastic – thanks!

    Thread Starter PeVo

    (@pevo)

    12 years, 6 months ago

    Actually what it looks like it was tripping up over was having

    <?

    all over the place instead of

    <?php

    Big Bagel

    (@big-bagel)

    12 years, 6 months ago

    Ah, didn’t even notice that. 🙂
    Yeah, some PHP set-ups don’t allow the short open tag. Always best to use <?php.

Viewing 4 replies - 1 through 4 (of 4 total)
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