Enhancement: Enable `blank_line_after_opening_tag` fixer (#875)

Enhancement: Enable `trailing_comma_in_multiline` fixer (#647)

* Enhancement: Enable and configure trailing_comma_in_multiline fixer

* Fix: Run 'make coding-standards'

Enhancement: Enable `no_mixed_echo_print` fixer (#864)

Enhancement: Enable `binary_operator_spaces` fixer

Closes GH-667.

Enhancement: Enable `array_syntax` fixer

Co-authored-by: MathiasReker <mathias@reker.dk>

Closes GH-659.

Multiple micro-optimizations

* Replace `ob_get_contents();ob_clean()` with `ob_get_clean()`

`ob_get_clean()` is equivalent to `ob_get_contents()` followed by `ob_clean()`.

Multiple micro-optimizations

* Replace `ob_get_contents();ob_clean()` with `ob_get_clean()`

`ob_get_clean()` is equivalent to `ob_get_contents()` followed by `ob_clean()`.

* Replace `intval()` calls with `(int)` type cast

This is a micro-optimization because `intval()` is a function call, and the type cast is about 6 times fast.

* Replace `preg_replace` call that could be done with an `rtrim()` call

In `./error.php`, there is a `preg_replace('!/+$!', '', $URI);` call that essentially is equivalent to `rtrim()`, that both calls removing trailing slash characters in `$URI`.
The `rtim()` call is more legible and faster.

* Combine consecutive `str_replace` calls to a single `str_replace` call

* Use short ternary operator where possible

Improves code readability.

* Cascade various `else` statements where possible

Cleans up the code by removing unnecessary `else` blocks and moving the code to the parent context if the previous `if` block exits the function by either terminating the script, or with a `return` statement.

* Combine multiple `isset()` calls to a single `isset()`

`isset()` accepts multiple parameters and returns `true` only if all of the parameters are `isset`. It makes sense to combine multiple individual `isset` calls to a single call for better readability.

* Replace `for` loop with a `foreach` loop

* Remove unnecessary character escapes in regular expressions

Regular expression special characters are context-sensitive. For example, special characters such as `.` are not considered special within square braces (`[]`).
This removes several of such instances that certain characters are escaped, but it is not strictly necessary within the context. This improves the readability of the expression.

See more information at [PHP.Watch: Writing better Regular Expressions in PHP](https://php.watch/articles/php-regex-readability#reduce-escape)

* Remove unnecessary break statement

* Remove unnecessary PHP close tags

* Remove redundant JSON_ERROR_NONE check

Remove unnecessary `json_last_error() == JSON_ERROR_NONE` where the decoded object is inspected already.

Closes GH-603.

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Swap uses of _SERVER[DOCUMENT_ROOT] for __DIR__

2/4 - Update remaining except archives/ and release/.

Change dirname(__FILE__) to shorter __DIR__

Sync final and leading newlines

This patch adds some missing newlines, trims some multiple redundant
final newlines into a single one, and trims few redundant leading
newlines.

Sync final and leading newlines

This patch adds some missing newlines, trims some multiple redundant
final newlines into a single one, and trims few redundant leading
newlines.

According to POSIX, a line is a sequence of zero or more non-'<newline>'
characters plus a terminating '<newline>' character. [1] Files should
normally have at least one final newline character.

C89 [2] and later standards [3] mention a final newline:
"A source file that is not empty shall end in a new-line character,
which shall not be immediately preceded by a backslash character."

Although it is not mandatory for all files to have a final newline
fixed, a more consistent and homogeneous approach brings less of commit
differences issues and a better development experience in certain text
editors and IDEs.

[1] http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap03.html#tag_03_206
[2] https://port70.net/~nsz/c/c89/c89-draft.html#2.1.1.2
[3] https://port70.net/~nsz/c/c99/n1256.html#5.1.1.2

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Trim trailing whitespace

This patch cleans all redundant trailing whitespace across the
repository except for the icalendar files.

Kill browser cache

Cache the images for a day

Fix same origin policy errors

Maybe this fixes stuff for Opera?
It fixes some issues in Chrome fetching the elephpants for example
on http://php.net (as the elephants requests www.ph

Fix same origin policy errors

Maybe this fixes stuff for Opera?
It fixes some issues in Chrome fetching the elephpants for example
on http://php.net (as the elephants requests www.php.net).

The policy check will automatically support all php.net subdomains

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Fix counting logic.. as we skip an item if it doesn't exist

Also, don't allow more then 50 pics

Have a fixed limit here, and remove endless count()s

Replace __DIR__ with dirname(__FILE__). It's easy to forget that this
constant was only added in 5.3 (some mirrors run old versions).

Made elephpant image banner dynamic.

Elephpant images are pulled from flickr via the php-master server hourly.
The web site now provides a simple PHP script to serve a random sampling

Made elephpant image banner dynamic.

Elephpant images are pulled from flickr via the php-master server hourly.
The web site now provides a simple PHP script to serve a random sampling
of these images in JSON format.

The web browser now loads the elephpant images via JavaScript, requesting
only the number of images that are required to fill the viewport. Images
are inserted into the page using the data URI scheme. This ensures that
only one http request is needed to load all of the required images.

If the browser window resizes, the JavaScript will fetch additional images
as required to fill out the viewport again. There is a slight delay built
in (250ms) to avoid excessive requests while the window is being resized.

Some browsers (e.g. older versions of MSIE) do not support the data URI
scheme. For these browsers we may wish to provide a fallback mechanism of
aggregating the images (e.g. MHTML, aka MIME HTML).

If the images fail to load, the elephant banner is hidden automatically.

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