Ausführliche Erläuterung der Beurteilung von PHP-Suffixnamen und Beispiele für zufällige Benennungen-PHP-Tutorial-php.cn

Einzelheiten finden Sie im Codebeispiel unten

form.php

Upload Image upload.php

<?php include("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

<?php header("Content-type:text/html;charset=utf8"); // 获取文件后缀名函数 function fileext($filename){ $sTemp = strrchr($filename, "."); return substr($sTemp, 1); } function fileext2($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 = 36){ $n = 36 + ceil(($n-36)/3) * 3; $captchaResult .= substr($captchaSource, $n, 3); }else{ $captchaResult .= substr($captchaSource, $n, 1); } } return $captchaResult; } ?> Drei Dateien zu einer zusammenfassen:

<?php // 获取文件后缀名函数 function fileext($filename){ $sTemp = strrchr($filename, "."); return substr($sTemp, 1); } function fileext2($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 = 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