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:
注: 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.
提示: 如果 fopen wrappers 已啟動,則可藉此函數把檔名當成URL使用。參考 fopen() 有更多關於如何指定檔名的細節和附錄 L支援URL協定的列表。
警告 |
PHP 4.3.0 之前的 Windows PHP版本不支援由此函數存取遠端檔案,即使啟動allow_url_fopen選項。 |