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Determine if variable is defined in Python [duplicate]

...ime? This is not always obvious because (1) the variable could be conditionally set, and (2) the variable could be conditionally deleted. I'm looking for something like defined() in Perl or isset() in PHP or defined? in Ruby. ...
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Amazon S3 Change file download name

...mention that it was not me to provide the right answer on Amazon forum and all credits should go to Colin Rhodes ;-) share | improve this answer | follow | ...
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How to check if a string starts with a specified string? [duplicate]

...-thread cache of compiled regular expressions (up to 4096). http://www.php.net/manual/en/intro.pcre.php share | improve this answer | follow | ...
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Convert from MySQL datetime to another format with PHP

...oking for a way to normalize a date into MySQL format, use the following $phpdate = strtotime( $mysqldate ); $mysqldate = date( 'Y-m-d H:i:s', $phpdate ); The line $phpdate = strtotime( $mysqldate ) accepts a string and performs a series of heuristics to turn that string into a unix timestamp. T...
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Pass a PHP string to a JavaScript variable (and escape newlines) [duplicate]

What is the easiest way to encode a PHP string for output to a JavaScript variable? 14 Answers ...
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Escaping HTML strings with jQuery

... jsbin.com/fazimigayo/1/edit?html,js,console,output (and it should work on all earlier versions too) – Henrik N Nov 5 '16 at 20:46 ...
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What is the difference between fastcgi and fpm?

I am trying to install php with fpm on macports. I read somewhere that fpm means FastCGI process manager. Does that mean fastcgi and fpm are same? If they are same, then why do we have two different macports variants for php namely "php5 +fastcgi" and "php5 +fpm" ...
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Correct owner/group/permissions for Apache 2 site files/folders under Mac OS X?

...go-rwx DIR (nobody other than owner can access content) chmod go+x DIR (to allow "users" including _www to "enter" the dir) sudo chgrp -R _www ~/my/web/root (all web content is now group _www) chmod -R go-rwx ~/my/web/root (nobody other than owner can access web content) chmod -R g+rx ~/my/web/root...
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What does “=>” mean in PHP?

...ach statements. The '=>' links the key and the value. According to the PHP Manual, the '=>' created key/value pairs. Also, Equal or Greater than is the opposite way: '>='. In PHP the greater or less than sign always goes first: '>=', '<='. And just as a side note, excluding the sec...
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Cookies vs. sessions

...ad of sessions? I have just that reason (that I do not need to store internally information about the user). Is that enough as a reason ? or it's more than that? Could you please tell me about advantages/disadvantages of using cookies for keeping User's ID? ...