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Reference — What does this symbol mean in PHP?
... a collection of questions that come up every now and then about syntax in PHP. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.
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Reference: What is variable scope, which variables are accessible from where and what are “undefined
What is "variable scope" in PHP? Are variables from one .php file accessible in another? Why do I sometimes get "undefined variable" errors?
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getenv() vs. $_ENV in PHP
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According to the php documentation about getenv, they are exactly the same, except that getenv will look for the variable in a case-insensitive manner. Most of the time it probably doesn't matter, but one of the comments on the documentation...
How can I parse a JSON file with PHP? [duplicate]
I tried to parse a JSON file using PHP. But I am stuck now.
16 Answers
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Dynamically generating a QR code with PHP [closed]
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The easiest way to generate QR codes with PHP is the phpqrcode library.
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Path of assets in CSS files in Symfony 2
...ombinations on the same twig, and this route was launched from
"/app_dev.php/"
"/app.php/"
and "/"
thus giving 14 x 3 = 42 tests.
Additionally, all this has been tested working in a subdirectory, so there is no way to fool by giving absolute URLs because they would simply not work.
The tests w...
PHP memory profiling
What's a good way to profile a PHP page's memory usage? For example, to see how much memory my data is using, and/or which function calls are allocating the most memory.
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The character encoding of the HTML document was not declared
...ur HTML tags and doctype go away. You need to include those in your insert.php file:
<!DOCTYPE html PUBLIC"-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" ...
Returning JSON from PHP to JavaScript?
I have a PHP script that's being called through jQuery AJAX. I want the PHP script to return the data in JSON format to the javascript. Here's the pseudo code in the PHP script:
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Getting the name of a child class in the parent class (static context)
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in short. this is not possible. in php4 you could implement a terrible hack (examine the debug_backtrace()) but that method does not work in PHP5. references:
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edit: an example of late static binding in PHP 5.3 (mentioned in comments). no...