Manußl PHP
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ImageCreateFromPNG

(PHP 3>= 3.0.13, PHP 4 >= 4.0.0)

ImageCreateFromPNG -- Create a new image from file or URL

Description

int imagecreatefrompng ( string filename)

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

ImageCreateFromPNG() returns an empty string on failure. It also outputs an error message, which unfortunately displays as a broken link in a browser. To ease debugging the following example will produce an error PNG:

P°φklad 1. Example to handle an error during creation (courtesy vic@zymsys.com) 

function LoadPNG ($imgname) {
    $im = @ImageCreateFromPNG ($imgname); /* Attempt to open */
    if (!$im) { /* See if it failed */
        $im  = ImageCreate (150, 30); /* Create a blank image */
        $bgc = ImageColorAllocate ($im, 255, 255, 255);
        $tc  = ImageColorAllocate ($im, 0, 0, 0);
        ImageFilledRectangle ($im, 0, 0, 150, 30, $bgc);
        /* Output an errmsg */
        ImageString ($im, 1, 5, 5, "Error loading $imgname", $tc);
    }
    return $im;
}

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