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PHP: How to generate a random, unique, alphanumeric string for use in a secret link?

How would it be possible to generate a random, unique string using numbers and letters for use in a verify link? Like when you create an account on a website, and it sends you an email with a link, and you have to click that link in order to verify your account ...
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How to tell if JRE or JDK is installed

... testing. However, when I got a java application working on this computer, and then tried it on another, it complained that JDK was required. How can I check if JDK was somehow installed on my system? Note: the computer in question is a Mac. ...
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Shell command to sum integers, one per line?

I am looking for a command that will accept (as input) multiple lines of text, each line containing a single integer, and output the sum of these integers. ...
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What rules does software version numbering follow? [duplicate]

I have been developing some software and want to give it version numbers. 3 Answers 3 ...
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“Diff” an image using ImageMagick

...riginal image. Now, I need to compare the original to the written on image and extract just the writing in image format. 2 ...
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In AngularJS, what's the difference between ng-pristine and ng-dirty?

What are the differences between ng-pristine and ng-dirty ? It seems you can have both to be true : 5 Answers ...
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$.ajax - dataType

...ct. Expecting JSON, or XML, or HTML, etc. The default is for jQuery to try and figure it out. The $.ajax() documentation has full descriptions of these as well. In your particular case, the first is asking for the response to be in UTF-8, the second doesn't care. Also the first is treating the...
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Can inner classes access private variables?

...ava though, there is no correlation between an object of type Outer::Inner and an object of the parent class. You have to make the parent child relationship manually. #include <string> #include <iostream> class Outer { class Inner { public: Inner(Outer& ...
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PEP 8, why no spaces around '=' in keyword argument or a default parameter value?

...hout spaces. It is easier to recognize that we are using keyword arguments and not assigning a variable to itself. Also, parameters tend to go in the same line whereas assignments usually are each one in their own line, so saving space is likely to be an important matter there. ...
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Difference between ref and out parameters in .NET [duplicate]

What is the difference between ref and out parameters in .NET? What are the situations where one can be more useful than the other? What would be a code snippet where one can be used and another can't? ...