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From example #2 on the PHP array_key_exists page: "isset() does not return TRUE for array keys that correspond to a NULL value, while array_key_exists() does." php.net/manual/en/function.array-key-exists.php

Jose A
– Jose A

2012-12-29 23:18:28 +00:00
Commented Dec 29, 2012 at 23:18

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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
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indent code by 4 spaces
backtick escapes `like _so_`
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