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HomeBackend DevelopmentPHP Tutorial上传图片功能解决方案

上传图片功能
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.......)
------解决思路----------------------
strtolower(substr(strrchr($filename, '.'), 1, 10));
获取后缀名,判断
------解决思路----------------------
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<br />(<br />    [0] => 286<br />    [1] => 314<br />    [2] => 2<br />    [3] => width="286" height="314"<br />    [bits] => 8<br />    [channels] => 3<br />    [mime] => image/jpeg<br />)<br />

当 getimagesize() 返回空时就表示不是图片文件
------解决思路----------------------

引用:
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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