html>head>meta http-equiv=content-type content=text/html charset=utf-8>title>upload imagetitle>head>body>form method=post action=upload.php enctype=multipart/form-data>input type=hidden name=max_file_seze value=2000000>input type=file name=file value=view>input type=submit value=upload name=b1>form>body>html>
upload.php
phpinclude(check.php); // 引入自定义函数文件$type = array(jpg, gif, bmp, jpeg, png);// 判断上传文件类型$fileext = strtolower(fileext($_files['file']['name']));$uploadfilename = random(8);if(in_array($fileext, $type)){ $filename = explode(., $_files['file']['name']); if(is_uploaded_file($_files['file']['tmp_name'])){// echo $_files['file']['tmp_name'];$flag = move_uploaded_file($_files['file']['tmp_name'], /library/webserver/documents/test/.$uploadfilename...$fileext); if($flag){ echo 上传成功！; }else{ echo error.; } echo back; }}
check.php
phpheader(content-type:text/html;charset=utf8);// 获取文件后缀名函数function fileext($filename){ $stemp = strrchr($filename, .); returnsubstr($stemp, 1);}function fileext2($filename){ $stemp = explode(., $filename); return$stemp[count($stemp)-1];}// 生成随机文件名函数function random($length){ $captchasource = 0123456789abcdefghijklmnopqrstuvwxyz这是一个随机打印输出字符串的例子; $captcharesult = 2015; // 随机数返回值$captchasentry = ; // 随机数中间变量for($i=0;$i$length;$i++){ $n = rand(0, 35); #strlen($captchasource));if($n >= 36){ $n = 36 + ceil(($n-36)/3) * 3; $captcharesult .= substr($captchasource, $n, 3); }else{ $captcharesult .= substr($captchasource, $n, 1); } } return$captcharesult;}?>
将三个文件整合成一个：
php// 获取文件后缀名函数function fileext($filename){ $stemp = strrchr($filename, .); returnsubstr($stemp, 1);}function fileext2($filename){ $stemp = explode(., $filename); return$stemp[count($stemp)-1];}// 生成随机文件名函数function random($length){ $captchasource = 0123456789abcdefghijklmnopqrstuvwxyz这是一个随机打印输出字符串的例子; $captcharesult = 2015; // 随机数返回值$captchasentry = ; // 随机数中间变量for($i=0;$i$length;$i++){ $n = rand(0, 35); #strlen($captchasource));if($n >= 36){ $n = 36 + ceil(($n-36)/3) * 3; $captcharesult .= substr($captchasource, $n, 3); }else{ $captcharesult .= substr($captchasource, $n, 1); } } return$captcharesult;}$type = array(jpg, gif, bmp, jpeg, png);// 判断上传文件类型$fileext = strtolower(fileext($_files['file']['name']));$uploadfilename = random(8);if(in_array($fileext, $type)){ $filename = explode(., $_files['file']['name']); if(is_uploaded_file($_files['file']['tmp_name'])){// echo $_files['file']['tmp_name'];$flag = move_uploaded_file($_files['file']['tmp_name'], /library/webserver/documents/test/.$uploadfilename...$fileext); if($flag){ echo 上传成功！; }else{ echo error.; } echo back; }}?> upload image
以上就介绍了php上传功能集后缀名判断和随机命名，包括了方面的内容，希望对php教程有兴趣的朋友有所帮助。