写php简单上传图片时,发现200k的图片上传时报Internal Server Error错误,检查了 upload_max_filesize,及其他post_max_size、max_input_time、memory_limit、 max_execution_time配置项均没有问题,后检查错误日 志:mod_fcgid: HTTP request length 138296 (so far) exceeds MaxRequestLen (131072), 发现问题所在。
原 来是fastcgi模式下的设置问题,看上去是因为HTTP刚才的请求长度(138296 )太长,大于现有的131072最大请求长度。看了fcgid 的配置文件后,发现并没有配置过MaxRequestLen的参数。看来这个131072的配置是默认的了。于是在fcgid的配置文件里加入这个配 置,15728640是15M,因为我的php.ini中设置的最大POST长度是15M,所以把它们设置长一样 的:MaxRequestLen 15728640
MaxRequestLen 15728640
AddHandler fcgid-script .fcgi .php
# Where to look for the php.ini file?
FcgidInitialEnv PHPRC ”e:/wamp/bin/apache/apache2.3.14/bin”
# Set PHP_FCGI_MAX_REQUESTS to greater than or equal to FcgidMaxRequestsPerProcess
# to prevent php-cgi process from exiting before all requests completed
FcgidInitialEnv PHP_FCGI_MAX_REQUESTS 1000
# Maximum requests a process should handle before it is terminated
FcgidMaxRequestsPerProcess 1000
# Maximum number of PHP processes
FcgidMaxProcesses 15
# Number of seconds of idle time before a php-cgi process is terminated
FcgidIOTimeout 120
FcgidIdleTimeout 120
#Path to php-cgi
FcgidWrapper ”e:/wamp/bin/php/php5.4/php-cgi.exe” .php
# Define the MIME-Type for ”.php” files
AddType application/x-httpd-php .php
里面的“MaxRequestLen”就是fastcgi模式下上传文件也就是http接受的最大文件长度。
问题解决
注:
PHP默认的上传限定是最大2M,想上传超过此设定的文件,需要调整PHP、apache等的一些参数。下面,我们简要介绍一下PHP文件上传涉及到的一些参数:
file_uploads
:是否允许通过HTTP上传文件的开关,默认为ON即是开。
upload_tmp_dir
:upload_tmp_dir用来说明PHP上传的文件放置的临时目录,要想上传文件,得保证服务器没有关闭临时文件和有对文件夹的写权限,如果未指定则PHP使用系统默认值。
upload_max_filesize
:允许上传文件大小的最大值,默认为2M。
post_max_size
:控制在采用POST方法进行一次表单提交中PHP所能够接收的最大数据量。如果希望使用PHP文件上传功能,则需要将此值改为比upload_max_filesize要大。
max_input_time
:以秒为单位对通过POST、GET以及PUT方式接收数据时间进行限制。如果应用程序所运行环境处在低速链路上,则需要增加此值以适应接收数据所需的更多时间。
memory_limit
:为了避免正在运行的脚本大量使用系统可用内存,PHP允许定义内存使用限额。通过memory_limit变量来指定单个脚本程序可以使用的最大内存容量变量memory_limit的值应当适当大于post_max_size的值。
max_execution_time
:max_execution_time 设置了在强制终止脚本前PHP等待脚本执行完毕的时间,此时间以秒计算。当脚本进入了一个无限循环状态时此变量非常有用。然而,当存在一个需要很长时间完 成的合法活动时(例如上传大型文件),这项功能也会导致操作失败。在这样的情况下必须考虑将此变量值增加,以避免PHP在脚本正在执行某些重要过程的时候 将脚本关闭。
对于linux主机,可能在/etc/httpd/conf.d/access.conf/下面里面还有php.conf 文件,这个文件可能会解决一些系统的文件大小限制问题。

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