form.php
<html><head><metahttp-equiv="content-type"content="text/html"charset="utf-8"><title>Upload Image</title></head><body><formmethod="post"action="upload.php"enctype="multipart/form-data"><inputtype="hidden"name="MAX_FILE_SEZE"value="2000000"><inputtype="file"name="file"value="view"><inputtype="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"<a href='javascript:history.go(-1)'>Back</a>";
}
}
check.php
<?phpheader("Content-type:text/html;charset=utf8");//获取文件后缀名函数functionfileext($filename){$sTemp=strrchr($filename, ".");returnsubstr($sTemp, 1);
}functionfileext2($filename){$sTemp=explode(".",$filename);return$sTemp[count($sTemp)-1];
}//生成随机文件名函数functionrandom($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$captchaResult;
}?>
将三个文件整合成一个：
<?php//获取文件后缀名函数functionfileext($filename){$sTemp=strrchr($filename, ".");returnsubstr($sTemp, 1);
}functionfileext2($filename){$sTemp=explode(".",$filename);return$sTemp[count($sTemp)-1];
}//生成随机文件名函数functionrandom($length){$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"<a href='Javascript:history.go(-1)'>Back</a>";
}
}?>
<html>
<head>
<meta http-equiv="content-type" content="text/html" charset="utf-8">
<title>Upload Image</title>
</head>
<body>
<form method="post" action="" 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>