php上传文件与图片重命名方法总结
上传文件或图片进行重命名是我们在php上传中会碰到的一个问题了,在重命名无非就是对你上传的文件生成一个随机的字符串了,包括有Md5,随机,或按时间日期来重命名了,下面我来给大家介绍。
如我们在上传文件页面中如下操作:
$name=$_FILES['userfile']['name']; //将所上传的文件名称赋予name
然后我们要对它进行重命名,代码如下:
//文件名的自动生成 list( $usec , $new_name ) = explode ( " " , microtime()); if (@ $extension_name ){ //限制文件类型为jpg、gif、png、bmp move_uploaded_file( $tmp_name , $new_dir . '/' . $new_name . '.' . $extension_name ); //移动到目标文件夹 echo '上传成功' ;这样我们就把文件名以时间日期生成了一个新的文件名了,代码如下:
< form action = "upload_file.php" method = "post" enctype = "multipart/form-data" > < label for = "file" > Filename: </ label > < input type = "file" name = "file" id = "file" /> < br /> < input type = "submit" name = "submit" value = "Submit" /> </ form >以下是我添加的将文件名重命名为系统时间的代码:
<?php $date = date (ymdhis); //echo($date); if ((( $_FILES [ "uppic" ][ "type" ] == "image/gif" ) || ( $_FILES [ "uppic" ][ "type" ] == "image/jpeg" ) || ( $_FILES [ "uppic" ][ "type" ] == "image/pjpeg" )) && ( $_FILES [ "uppic" ][ "size" ] < 2000000)) { if ( $_FILES [ "uppic" ][ "error" ] > 0) { echo "Return Code: " . $_FILES [ "uppic" ][ "error" ] . "<br />" ; } else { //echo "Upload: " . $_FILES["uppic"]["name"] . "<br />"; //echo "Type: " . $_FILES["uppic"]["type"] . "<br />"; //echo "Size: " . ($_FILES["uppic"]["size"] / 1024) . " Kb<br />"; //echo "Temp file: " . $_FILES["uppic"]["tmp_name"] . "<br />"; $uptype = explode ( "." , $_FILES [ "uppic" ][ "name" ]); $newname = $date . "." . $uptype [1]; //echo($newname); $_FILES [ "uppic" ][ "name" ] = $newname ; if ( file_exists ( "pics/" . $_FILES [ "uppic" ][ "name" ])) { echo $_FILES [ "uppic" ][ "name" ] . " already exists. " ; } else { $_FILES [ "uppic" ][ "name" ] = move_uploaded_file( $_FILES [ "uppic" ][ "tmp_name" ], "pics/" . $_FILES [ "uppic" ][ "name" ]); echo "<script>alert('上传成功!')</script>" ; echo "<script>window.location.href='http://www.111cn.net';</script>" ; } } } else { echo "Invalid file" ; } ?>好了,就讲到这里了,大家可参考。
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