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Determining Referer in PHP

...s the most reliable and secure way to determine what page either sent, or called (via AJAX), the current page. I don't want to use the $_SERVER['HTTP_REFERER'] , because of the (lack of) reliability, and I need the page being called to only come from requests originating on my site. Edit: I am...
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Performance differences between debug and release builds

I must admit, that usually I haven't bothered switching between the Debug and Release configurations in my program, and I have usually opted to go for the Debug configuration, even when the programs are actually deployed at the customers place. ...
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How to color the Git console?

...obal color.ui auto The color.ui is a meta configuration that includes all the various color.* configurations available with git commands. This is explained in-depth in git help config. So basically it's easier and more future proof than setting the different color.* settings separately. In-d...
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Revert to a commit by a SHA hash in Git? [duplicate]

...ample, I want to revert to a commit six commits behind the head, reverting all the changes in the intermediary commits in between. ...
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map vs. hash_map in C++

...tied to that key. map is implemented as a balanced binary search tree (usually a red/black tree). An unordered_map should give slightly better performance for accessing known elements of the collection, but a map will have additional useful characteristics (e.g. it is stored in sorted order, which...
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https URL with token parameter : how secure is it?

...ased on their private information (given through a form). We would like to allow them to get back on their simulation results later, but without forcing them to create a login/password account. ...
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How can I eliminate slow resolving/loading of localhost/virtualhost (a 2-3 second lag) on Mac OS X L

... I had the exact same problem and it was driving me crazy! Put all your hosts file entries for localhost into one line like so: 127.0.0.1 localhost myproject.dev myotherproject.dev ::1 localhost fe80::1%lo0 localhost Worked like a charm for me. Seems like a bug in Lion. ...
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Where is virtualenvwrapper.sh after pip install?

I'm trying to setup virtualenvwrapper on OSX, and all the instructions and tutorials I've found tell me to add a source command to .profile, pointing towards virtualenvwrapper.sh. I've checked all the python and site-packages directories, and I can't find any virtualenvwrapper.sh. Is this something ...
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How do I do a case-insensitive string comparison?

...he string Σίσυφος (“Sísyphos”, or better “Síſyphos”) has all three: uppercase at the front, lowercase final at the end, and lowercase nonfinal at the third position. If your two strings are Σίσυφος and ΣΊΣΥΦΟΣ, then your approach fails, because those are supposed to ...
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Catching java.lang.OutOfMemoryError?

... to do so). In general, the OutOfMemoryError occurs due to a block memory allocation that cannot be satisfied with the remaining resources of the heap. When the Error is thrown the heap contains the same amount of allocated objects as before the unsuccessful allocation and now is the time to drop ...