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Cron job every three days

...ike the 1st, 4th, 7th, etc... then you can just have a conditional in your script that checks for the current day of the month. if (((date('j') - 1) % 3)) exit(); or, as @mario points out, you can use date('k') to get the day of the year instead of doing it based on the day of the month. ...
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Nginx serves .php files as downloads, instead of executing them

....php index.html index.htm; Uncomment location ~ \.php$ {} # pass the PHP scripts to FastCGI server listening on (...) # location ~ \.php$ { try_files $uri =404; fastcgi_split_path_info ^(.+\.php)(/.+)$; # NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini # W...
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How to force a web browser NOT to cache images

...th HTML forms for events where they fill the fields (date, place, title, description, links, etc.) and save it. On that form I allow the administrator to upload an image related to the event. On the HTML page displaying the form, I am also showing a preview of the picture uploaded (HTML img tag). ...
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What is the purpose of the -m switch?

...w modules to be located using the Python module namespace for execution as scripts. The motivating examples were standard library modules such as pdb and profile, and the Python 2.4 implementation is fine for this limited purpose. So you can specify any module in Python's search path this way, not...
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Centering floating divs within another div

...head> <title>Knowledge is Power</title> <script src="js/jquery.js"></script> <script type="text/javascript"> </script> <style type="text/css"> #outer { text-align:center; ...
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Jump to editor shortcut in Intellij IDEA

...o the editor. Esc is not always going to put the focus on editor. For those on Mac (you don't have a Home key), use Command + E to open the recent files then hit enter. share | improve this answe...
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How to automatically generate a stacktrace when my program crashes

... For Linux and I believe Mac OS X, if you're using gcc, or any compiler that uses glibc, you can use the backtrace() functions in execinfo.h to print a stacktrace and exit gracefully when you get a segmentation fault. Documentation can be found in the l...
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How to add default value for html ? [closed]

...n here }]); <!DOCTYPE html> <html> <head> <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script> <meta charset="utf-8"> <title>JS Bin</title> </head> <body ng-app='myApp'> ...
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Pip install Matplotlib error with virtualenv

...of libpng-devel and freetype-devel (or whatever the equivalent is for your OS). See the building requirements/instructions for matplotlib. share | improve this answer | foll...
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How does this giant regex work?

...\x61\x6C is equivalent to just typing eval, but someone who sees eval in a script is going to realize immediately that something is up. The complete replacement string translates to: eval(gzinflate(base64_decode("..."))); I left out the ... contents, but that's the complete code the malware autho...