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How to encrypt/decrypt data in php?

I'm currently a student and I'm studying PHP, I'm trying to make a simple encrypt/decrypt of data in PHP. I made some online research and some of them were quite confusing(at least for me). ...
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Python Script execute commands in Terminal

... somewhere a while ago but cant seem to find it. I am trying to find a command that will execute commands in the terminal and then output the result. ...
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What is the strict aliasing rule?

... struct onto such a buffer, or a buffer onto such a struct through pointer casting you can easily violate strict aliasing rules. So in this kind of setup, if I want to send a message to something I'd have to have two incompatible pointers pointing to the same chunk of memory. I might then naively co...
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Do on-demand Mac OS X cloud services exist, comparable to Amazon's EC2 on-demand instances? [closed]

Amazon's EC2 service offers a variety of Linux and Windows OS choices, but I haven't found a service offering a similar "rent by the hour" service for a remote Mac OS X virtual machine. Does such a service exist? (iCloud looks to be just a data storage service, rather than a service allowing remot...
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Installing PG gem on OS X - failure to build native extension

... Same error for me and I didn't experience it until I downloaded OS X 10.9 (Mavericks). Sigh, another OS upgrade headache. Here's how I fixed it (with homebrew): Install another build of Xcode Tools (typing brew update in the terminal will p...
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Create empty file using python [duplicate]

...fter the open() statement finished - but it's cleaner to do it explicitely and relying on CPython-specific behaviour is not good either. In case you want touch's behaviour (i.e. update the mtime in case the file exists): import os def touch(path): with open(path, 'a'): os.utime(path, N...
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Excluding directories in os.walk

I'm writing a script that descends into a directory tree (using os.walk()) and then visits each file matching a certain file extension. However, since some of the directory trees that my tool will be used on also contain sub directories that in turn contain a LOT of useless (for the purpose of thi...
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Why is the apt-get function not working in the terminal on Mac OS X v10.9 (Mavericks)?

I was watching this , and, as you can see, the first command I am told to put in is: 5 Answers ...
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Conditional import of modules in Python

...mport simplejson as json as it is likely a newer (faster) version of the standard json module. – Seppo Erviälä Oct 20 '12 at 17:07 ...
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Automatically remove Subversion unversioned files

...The other solution from bellow svn cleanup --remove-unversioned is better. And it is for Subversion 1.9.0 (this version is from 2015). It is stable and standar. – tres.14159 Nov 21 '18 at 8:19 ...