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List all files in one directory PHP [duplicate]

What would be the best way to list all the files in one directory with PHP? Is there a $_SERVER function to do this? I would like to list all the files in the usernames/ directory and loop over that result with a link, so that I can just click the hyperlink of the filename to get there. Thanks! ...
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Why does String.valueOf(null) throw a NullPointerException?

... that the most specific method is chosen. A char[] is-an Object, but not all Object is-a char[]. Therefore, char[] is more specific than Object, and as specified by the Java language, the String.valueOf(char[]) overload is chosen in this case. String.valueOf(char[]) expects the array to be non-nu...
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Is it OK to leave a channel open?

...ose a channel when it is important to tell the receiving goroutines that all data have been sent. A channel that the garbage collector determinies to be unreachable will have its resources reclaimed whether or not it is closed. (Don't confuse this with the close operation for open files. It ...
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vim command to restructure/force text to 80 columns

I know there are ways to automatically set the width of text in vim using set textwidth (like Vim 80 column layout concerns ). What I am looking for is something similar to = (the indent line command) but to wrap to 80. The use case is sometimes you edit text with textwidth and after joining li...
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req.query and req.param in ExpressJS

...d: "5"} req.param is a function that peels parameters out of the request. All of this can be found here. UPDATE If the verb is a POST and you are using bodyParser, then you should be able to get the form body in you function with req.body. That will be the parsed JS version of the POSTed form. ...
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Class type check in TypeScript

...e used there anymore: The is operator, which is new for ActionScript 3.0, allows you to test whether a variable or expression is a member of a given data type. In previous versions of ActionScript, the instanceof operator provided this functionality, but in ActionScript 3.0 the instanceof operator ...
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Create Django model or update if exists

... update the user object. Sample use is as follows: # In both cases, the call will get a person object with matching # identifier or create one if none exists; if a person is created, # it will be created with name equal to the value in `name`. # In this case, if the Person already exists, its exi...
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Transparent ARGB hex value

The colors in this table is all not transparent. I guess the value for the A is set to FF . 5 Answers ...
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Why does SSL handshake give 'Could not generate DH keypair' exception?

... This works for me too, but I have added a provider dynamically. Reffer my answer here for details. – v.ladynev Nov 22 '15 at 9:19 ...
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What 'sensitive information' could be disclosed when setting JsonRequestBehavior to AllowGet

...the data from other domains making this request to yours. However, if you allowed GET requests then as well as making an AJAX request similar to the above with GET instead of POST, a malicious user could include your JSON in the context of their own site by using a script tag in the HTML. e.g. on w...