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I also check if a request is already running, but I use a boolean, as it's lighter.
– Zesty
Commented Jul 29, 2015 at 5:02
1

` var $request; if ($request != null)` Why? Here the code is creating an empty variable and then checking if it's not null without any strict check. What is the educational meaning of this useless check that it's always false? Moreover, this is a late answer that just tells to use abort() (already answered above) but without explaining it in any way. The phrase "It's always best practice to do something like this" is just a positive buzzword that entices inexperienced to vote up. Voted down for that until clarifications or improvements.
– Valerio Bozz
Commented Dec 10, 2021 at 8:44

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create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
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[example](https://example.com)
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