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Determine if variable is defined in Python [duplicate]
...eleted. I'm looking for something like defined() in Perl or isset() in PHP or defined? in Ruby.
6 Answers
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Check if an array is empty or exists
...iable hoisting. Make sure you use var whenever declaring a variable:
<?php echo "var image_array = ".json_encode($images);?>
// add var ^^^ here
And then make sure you never accidently redeclare that variable later:
else {
...
image_array = []; // no var here
}
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Does a `+` in a URL scheme/host/path represent a space?
... To get a literal + to be received by the back end (or, at least PHP) it has to be triple encoded: %25252B
– Umbrella
Sep 30 '15 at 15:01
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XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12
...mmend your solution. In my case I need to develop ASP .NET Application and PHP. If i stop World Wide Web Publishing Service i can't work on my ASP application. SO changing the port is solution for me. Thanks!
– mihkov
Nov 17 '16 at 13:44
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How to debug .htaccess RewriteRule not working
...ed)
ssl_module (shared)
status_module (shared)
version_module (shared)
php5_module (shared)
After that simple directives like Options -Indexes or deny from all will solidify that .htaccess are working correctly.
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Redirect non-www to www in .htaccess
...//www.%{HTTP_HOST}/login [R=301,L]
Where you replace login with checkout.php or whatever URL you need to support HTTPS on.
I'd argue this is a bad idea though. For the reasoning please read this answer.
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PostgreSQL Connection URL
...er=host;Port=5432;User Id=username;Password=secret;Database=databasename;
PHP documentation us here, the general connection string is
host=hostname port=5432 dbname=databasename user=username password=secret
If you're using something else, you'll have to tell us.
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Is there a query language for JSON?
...but with bindings to a wide range of programming languages (Java, node.js, php, ...) and even available in the browser via jq-web.
Here are some illustrations based on the original question, which gave this JSON as an example:
[{"x": 2, "y": 0}}, {"x": 3, "y": 1}, {"x": 4, "y": 1}]
SUM(X) WH...
Send email with PHPMailer - embed image in body
I'm trying to send HTML mail, with PHPMailer, with images.
The body is loaded from a html file, that contains all the info.
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