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What is the difference between single-quoted and double-quoted strings in PHP?

I'm a little confused why I see some code in PHP with string placed in single quotes and sometimes in double quotes. 12 Ans...
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phpmyadmin logs out after 1440 secs

In my local development Ubuntu box I use MySQL and phpmyadmin to work with the database. 24 Answers ...
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What are Long-Polling, Websockets, Server-Sent Events (SSE) and Comet?

... a lot about websockets (with socket.io [a node.js library]) but why not PHP ? You can use PHP with WebSockets, check out Ratchet. share | improve this answer | follow ...
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Multiple Updates in MySQL

...ice for dynamic updating too. For example, I used that solution in loop in php: $commandTxt = 'UPDATE operations SET chunk_finished = CASE id '; foreach ($blockOperationChecked as $operationID => $operationChecked) $commandTxt .= " WHEN $operationID THEN $ope...
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Is there a point to minifying PHP?

I know you can minify PHP, but I'm wondering if there is any point. PHP is an interpreted language so will run a little slower than a compiled language. My question is: would clients see a visible speed improvement in page loads and such if I were to minify my PHP? ...
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Are unused CSS images downloaded?

...e="text/css"> .nonexistent { background: url('index.php?foo'); } </style> </head> <body> <?php if(isset($_GET['foo'])) { file_put_contents('test.txt', $_SERVER['HTTP_USER_AGENT']); } ?> </body> </html> If te...
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How do I see the extensions loaded by PHP?

It's got to be somewhere in the phpinfo() dump, but I just don't know where. Is it supposed to be under the "Additional Modules" section? Somewhere else? I'm trying to figure out why some extensions don't appear to be loaded, but I don't even know where I should be looking. ...
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Maximum execution time in phpMyadmin

When I try to execute (some) queries in phpMyadmin I get this error 12 Answers 12 ...
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Showing all errors and warnings [duplicate]

... Display errors could be turned off in the php.ini or your Apache configuration file. You can turn it on in the script: error_reporting(E_ALL); ini_set('display_errors', '1'); You should see the same messages in the PHP error log. ...
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Asynchronous shell exec in PHP

I've got a PHP script that needs to invoke a shell script but doesn't care at all about the output. The shell script makes a number of SOAP calls and is slow to complete, so I don't want to slow down the PHP request while it waits for a reply. In fact, the PHP request should be able to exit without ...