[wp-hackers] Extract first image from a post

[andré renaut]

I am using this php code to retrieve the first image of a post :


function teaserimg($hmax=100)
{
    $teaserimg = '';

    ob_start();

        the_content();

        $html = ob_get_contents();

    ob_end_clean();
    $output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $html,
$matches, PREG_SET_ORDER);
    if (isset($matches [0] [1]))
    {
        $hw = getimagesize($matches [0] [1]);

        if ($hw [1] < $hmax)
        {
            $hwi  = $hw [3];
        }
        else
        {
            $h    = $hmax;
            $w    = round ( (($hw [0] * $hmax) / $hw [1]) );
            $hwi  = 'width="';
            $hwi .= $w;
            $hwi .= '" height="';
            $hwi .= $h;
            $hwi .= '"';
        }

        $align ='left';
        $rand  = mt_rand (0,1);
        if ($rand == 1) $align='right';
        $align ='right';


        $teaserimg = '<img src="' . $matches [0] [1] . '" alt=" " align="' .
$align . '" border="0" hspace="5" vspace="5" ' . $hwi . '/>';


    }
    return $teaserimg;
}