ubuntu php 开启错误提示
ubuntu上默认安装完php是不开启错误提示的，如果我们在本地开发，出现错误会直接显示500错误类型。
那么怎么开启呢？
方法如下：
sudo gedit /etc/php5/apache2/php.ini往下看，你会看到一个简单的说明（当然不是改这个，这是说明）
，按照推荐的设置进行查找并修改相应的值就可以了，然后
sudo service apache2 restart;;;;;;;;;;;;;;;;;;;
; Quick Reference ;
;;;;;;;;;;;;;;;;;;;
; The following are all the settings which are different in either the production
; or development versions of the INIs with respect to PHP’s default behavior.
; Please see the actual settings later in the document for more details as to why
; we recommend these changes in PHP’s behavior.
; display_errors
; Default Value: On
; Development Value: On
; Production Value: Off
; display_startup_errors
; Default Value: Off
; Development Value: On
; Production Value: Off
; error_reporting
; Default Value: E_ALL & ~E_NOTICE & ~E_STRICT & ~E_DEPRECATED
; Development Value: E_ALL
; Production Value: E_ALL & ~E_DEPRECATED & ~E_STRICT
; html_errors
; Default Value: On
; Development Value: On
; Production value: On
; log_errors
; Default Value: Off
; Development Value: On
; Production Value: On
; max_input_time
; Default Value: -1 (Unlimited)
; Development Value: 60 (60 seconds)
; Production Value: 60 (60 seconds)
; output_buffering
; Default Value: Off
; Development Value: 4096
; Production Value: 4096
; register_argc_argv
; Default Value: On
; Development Value: Off
; Production Value: Off
; request_order
; Default Value: None
; Development Value: “GP”
; Production Value: “GP”
; session.gc_divisor
; Default Value: 100
; Development Value: 1000
; Production Value: 1000
; session.hash_bits_per_character
; Default Value: 4
; Development Value: 5
; Production Value: 5
; short_open_tag
; Default Value: On
; Development Value: Off
; Production Value: Off
; track_errors
; Default Value: Off
; Development Value: On
; Production Value: Off
; url_rewriter.tags
; Default Value: “a=href,area=href,frame=src,form=,fieldset=”
; Development Value: “a=href,area=href,frame=src,input=src,form=fakeentry”
; Production Value: “a=href,area=href,frame=src,input=src,form=fakeentry”
; variables_order
; Default Value: “EGPCS”
; Development Value: “GPCS”
; Production Value: “GPCS”