PHP Käsikirja
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imagecreatefromgif

(PHP 3, PHP 4 )

imagecreatefromgif -- Create a new image from file or URL

Description

resource imagecreatefromgif ( string filename)

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

imagecreatefromgif() 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 GIF:

Esimerkki 1. Example to handle an error during creation (courtesy vic at zymsys dot com)

<?php
function LoadGif ($imgname)
{
    $im = @imagecreatefromgif ($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;
}
?>

Huomaa: Since all GIF support was removed from the GD library in version 1.6, this function is not available if you are using that version of the GD library.

Vihje: Tämän funktion kanssa voit käyttää myös URLia tiedostonimen sijaan jos "fopen wrappers" on kytketty päälle. Katso funktiosta fopen() lisätietoa tuetuista URL-protokollista ja siitä kuinka tiedoston nimi määritellään Liite J.

Varoitus

Windows versions of PHP prior to PHP 4.3.0 do not support accessing remote files via this function, even if allow_url_fopen is enabled.

EdellinenAlkuunSeuraava
imagecreatefromgdYlösimagecreatefromjpeg