imagecreatefrompng error

问题

<?php
function LoadPNG($imgname)
{
    /* Attempt to open */
    $im = @imagecreatefrompng($imgname);

    /* See if it failed */
    if(!$im)
    {
        /* Create a blank image */
        $im  = imagecreatetruecolor(150, 30);
        $bgc = imagecolorallocate($im, 255, 255, 255);
        $tc  = imagecolorallocate($im, 0, 0, 0);

        imagefilledrectangle($im, 0, 0, 150, 30, $bgc);

        /* Output an error message */
        imagestring($im, 1, 5, 5, 'Error loading ' . $imgname, $tc);
    }

    return $im;
}

header('Content-Type: image/png');

$img = LoadPNG('http://www.prideofhome.com/wp-content/uploads/328145505image_11.png');

imagepng($img);
imagedestroy($img);
?>

i am getting error..how to solve.is imagecreatefrompng doesnt support the file from remote server.

回答1:

To use a file from a remote server, use imagecreatefromstring in conjunction with file_get_contents:

$im = imagecreatefromstring(file_get_contents($imgname));

Note that a URL can be used as a filename with file_get_contents only if fopen wrappers have been enabled.

If this doesn't solve your problem, clarify your question. Give at least the error you're receiving. :)

回答2:

Removing the @ will let you see what's wrong. Either the apppropriate option isn't set, or the gd extension was built without PNG support, or the remote file doesn't exist/can't be downloaded.

来源：https://stackoverflow.com/questions/2779725/imagecreatefrompng-error

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