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Python append() vs. + operator on lists, why do these give different results?

...st. Specifically, it appends each of the elements of sequence in iteration order. An aside Being an operator, + returns the result of the expression as a new value. Being a non-chaining mutator method, list.extend() modifies the subject list in-place and returns nothing. Arrays I've added this due t...
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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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In PHP, can you instantiate an object and call a method on the same line?

... @CMCDragonkai logically that makes sense; the object only exists for the duration of the statement (new Foo)->property - the value you are storing has nowhere to go because the object will no longer exist after that as it's not stored anywhe...
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is_null($x) vs $x === null in PHP [duplicate]

...someone strongly suggested that I use is_null() instead as it is specifically designed for the null-evaluation purpose. He also started talking about math or something. ...
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Set cURL to use local virtual hosts

...nd. The default config file is checked for in the following places in this order: 1) curl tries to find the "home dir": It first checks for the CURL_HOME and then the HOME environment variables. Failing that, it uses getpwuid() on UNIX-like systems (which returns the home dir given ...
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How can I get useful error messages in PHP?

...ple syntax error (wrong bracket, missing semicolon), or a failed function call, or something else entirely. 43 Answers ...
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How to remove “index.php” in codeigniter's path

... AllowOverride All <--- replace None with All Order allow,deny allow from all </Directory> ... share | improve this answer | ...
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PHP session lost after redirect

... First, carry out these usual checks: Make sure session_start(); is called before any sessions are being called. So a safe bet would be to put it at the beginning of your page, immediately after the opening <?php declaration before anything else. Also ensure there are no whitespaces/tabs be...
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deny direct access to a folder and file by htaccess

... following in your .htaccess file in your includes directory: Satisfy all Order deny,allow Deny from all I ran into this when the upper directory defined basic authentication including the line: Satisfy any This was preventing my deny from all to take effect because the users were authenticate...
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Parsing a string into a boolean value in PHP

...urned only for "0", "false", "off", "no", and "", and NULL is returned for all non-boolean values. share | improve this answer | follow | ...