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最近在弄上传图片的功能
我说下我的思路:将用户上传的文件保存到服务器上,获取图片路径加名字   再用img 显示出来

怎么过滤一起其他文件(.exe,.pdf,.txt.......)


回复讨论(解决方案)

获取mine类型。

strtolower(substr(strrchr($filename, '.'), 1, 10));
获取后缀名,判断

getimagesize() 函数将测定任何 GIF,JPG,PNG,SWF,SWC,PSD,TIFF,BMP,IFF,JP2,JPX,JB2,JPC,XBM 或 WBMP 图像文件的大小并返回图像的尺寸以及文件类型
还是这样的结果

Array(    [0] => 286    [1] => 314    [2] => 2    [3] => width="286" height="314"    [bits] => 8    [channels] => 3    [mime] => image/jpeg)

当 getimagesize() 返回空时就表示不是图片文件

上穿的时候,判断一下文件的扩展名,不是你想要的就不要上传

用户上传图片时,图片的长宽是不知道的,而我放图片框长宽又是固定的,这个要怎么解决?
(设置img的长度,小的图片被放大,大的被缩小,看起来怪怪的)

用户上传图片时,图片的长宽是不知道的,而我放图片框长宽又是固定的,这个要怎么解决?
(设置img的长度,小的图片被放大,大的被缩小,看起来怪怪的)



上传图片后,可以对图片做一个压缩处理。压缩到尺寸和你显示的一样就可以。
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