Using the GD Library in PHP to implement remote picture download instance

This article mainly introduces the use of the GD Library in PHP to achieve remote picture download instances, this article directly to the implementation code, the need for friends can refer to the

Because today want to write a remote download pictures of the class, warm up to write a PHP GD library to achieve remote picture download function, of course, curl to achieve better, PHP GD library to achieve remote picture download function of the main use of the GD library two functions imagecreatefromxxx () Used to generate picture functions and imagexxx functions, XXX represents the extension of different pictures, so you have to find a way to get the extension of the remote picture, with the following PHP code:

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<?php header ("content-type:text/html; Charset=utf-8 ");   if (!empty ($_post[' submit ')) {$url = $_post[' url ']; $pictureName = $_post[' Picturename ']; $img = Getpicture ($url, $pictureName); Echo ' <pre></pre> '; The function getpicture ($url, $pictureName) {if ($url = = "") return false; Gets the extension of the picture $info = getimagesize ($url); $mime = $info [' MIME ']; $type = substr (STRRCHR ($mime, '/'), 1); Different picture types choose different pictures to generate and save function switch ($type) {case ' jpeg ': $img _create_func = ' imagecreatefromjpeg '; $img _save_func = ' Imagejpeg '; $new _img_ext = ' jpg '; Break Case ' png ': $img _create_func = ' imagecreatefrompng '; $img _save_func = ' imagepng '; $new _img_ext = ' png '; Break Case ' BMP ': $img _create_func = ' imagecreatefrombmp '; $img _save_func = ' imagebmp '; $new _img_ext = ' bmp '; Break Case ' gif ': $img _create_func = ' imagecreatefromgif '; $img _save_func = ' imagegif '; $new _img_ext = ' gif '; Break Case ' vnd.wap.wbmp ': $img _create_func = ' ImagecreatefRomwbmp '; $img _save_func = ' imagewbmp '; $new _img_ext = ' bmp '; Break Case ' XBM ': $img _create_func = ' IMAGECREATEFROMXBM '; $img _save_func = ' IMAGEXBM '; $new _img_ext = ' XBM '; Break Default: $img _create_func = ' imagecreatefromjpeg '; $img _save_func = ' imagejpeg '; $new _img_ext = ' jpg '; } if ($pictureName = = "") {$pictureName = time (). ". {$new _img_ext} "; }else{$pictureName = $pictureName. ". {$new _img_ext} "; $src _im = $img _create_func ($url); Create a new picture from the URL $img _save_func ($src _im, $pictureName); Output file to file return $pictureName; }  ?> <form method= "POST" action= "" > Remote URL Address: <input type= "text" name= "url" size=20/><br/> filename said: <input type= "text" name= "Picturename" size=20/> <input type= "Submit" name= "submit" value= "Download"/> </ Form>

The results of the operation are as follows: (the picture is automatically saved in the current file directory, do not understand can leave a message)