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What to do if php cannot upload files

王林

Nov 05, 2020 pm 03:38 PM

phpdocument

php无法上传文件的解决方法：1、查看上传目录是否有写入权限；2、编辑php.ini配置文件，修改【post_max_size= 8M】；3、查看upload_tmp_dir设定的目录权限。

What to do if php cannot upload files

解决方法：

1、检查网站目录的权限。

上传目录是否有写入权限

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2、php.ini配置文件

php.ini中影响上传的有以下几处:

file_uploads 是否开启 on 必须开启

post_max_size= 8M

PHP接受的POST数据最大长度。此设定也影响到文件上传。要上传大文件，该值必须大于"upload_max_filesize"，如果配置脚本中激活了内存限制，"memory_limit"也会影响文件上传。

一般说来，"memory_limit"应该比"post_max_size"要大。

upload_max_filesize = 2M

允许上传的文件的最大尺寸

upload_tmp_dir =C:\\windows\temp

文件上传时存放文件的临时目录，必须是PHP进程用户可写的目录，如果未指定则PHP使用系统默认值。

default_socket_timeout = 60

socket超时，单位是秒

max_execution_time = 30

每个脚本最大允许执行时间, 按秒计。默认为30秒。

这个参数有助于阻止劣质脚本无休止的占用服务器资源。

注: "max_execution_time"仅影响脚本本身的运行时间。

任何其它花费在脚本运行之外的时间，如用system()/sleep()函数的使用、数据库查询、文件上传等都不包括在内。

在安全模式下，你不能用ini_set()在运行时改变这个设置

max_input_time=60

每个脚本接受输入数据的最大允许时间（POST GET upload），按秒计

memory_limit = 128M

设置脚本最大能申请到的内存空间大小，防止劣质脚本消耗完服务器的内存资源。要使用此指令必须在编译的时候激活。因此 configure 一行中应该包括：--enable-memory-limit，如果不需要任何内存上的限制，必须将其设为 -1。

自php4.3.2 起，当设置了memory_limit后，memory_get_usage()函数将变为可用

3、upload_tmp_dir 目录权限

如果php配置没问题，那问题有可能出在upload_tmp_dir设定的目录权限问题。加入IIS_WPG除完全控制外的权限,users的读写权限,NETWORK SERVER除完全控制外的权限。

4、如果起用了ZEND，看Temp文件夹中是否有

ZendOptimizer.MemoryBase@SYSTEM和ZendOptimizer.MemoryBase@NETWORKSERVICE，如果没有，就建立它。

5、window guests来宾权限

如果以上都不行，那问题很有可能出在这里了，检查windows目录是否禁用guests来宾组，要给windows目录users组读取和执行权限。

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