imagecreatefrompng - Create a new image from file or URL - PHP

resource imagecreatefrompng ( string $filename )

Create a new image from file or URL

imagecreatefrompng() returns an image identifier representing the image obtained from the given filename


<?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('bogus.image');imagepng($img);imagedestroy($img);?>

PHPで画像を縮小してアップロードする

Make sure GD Library is enabled and "PNG Support" is must enabled in GD Library.

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