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如何设置PHP上传文件大小限制

WBOY
Release： 2016-05-25 16:55:12
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使用php的同学都会知道上传文件我们默认情况在php只会支持2MB文件上传大小了，如果超过了就无法上传了，下面我来给大家介绍如何设置PHP上传文件大小限制吧。

一，如果php没有限制我们可以在上传时就限制上传大小，如

 

 代码如下 复制代码
$maxattachsize=5097152;//最大上传大小，默认是2m
$temppath=$upfile['tmp_name'];
$filesize=filesize($temppath);
if($filesize > $maxattachsize)$err='文件大小超过'.$maxattachsize.'字节';

这样就限制了文件只能上传2MB大小的文件了


二，修改php.ini中的post_max_size和upload_max_filesize

1、memory_limit内存设置限制

2、max_execution_time程序执行时间限制

3、post_max_size最大POST数据限制

4、upload_max_filesize最大上传文件大小限制

例

 代码如下 复制代码

max_execution_time = 30     ; Maximum execution time of each script, in seconds
max_input_time = 60    ; Maximum amount of time each script may spend parsing request data
;max_input_nesting_level = 64 ; Maximum input variable nesting level
memory_limit = 128M      ; Maximum amount of memory a script may consume (128MB)

; Maximum size of POST data that PHP will accept.
post_max_size = 105M

; Maximum allowed size for uploaded files.
upload_max_filesize = 100M

小提示，如果你是上传大文件我们最好在页面加上执行时间set_time_limit

 代码如下 复制代码

set_time_limit(0);

这样就不会超时了



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