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A PHP CHEAT-SHEET
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SYNTAX
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All PHP code must be between "<?php" and "?>":
	<?php
		echo "Like this.";
	?>

Every statement ends with a semicolon, all function arguments
are seperated by commas, etc.


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OPERATORS
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Normal stuff (like +, -, etc.), but *also*:
	.	concatenation (mainly for strings, like "a" . "b" ... "ab")
	++	increment (add one, I.E. 1++ ... 2)
	--	decrement (subtract one, I.E. 2-- ... 1)


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COMPARISON OPERATORS
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	==	equal (same data)
	===	identical (same type + data)
	!=	not-equal (different data)
	!==	not-identicial (different type or data)
	<	less-than
	>	greater-than
	<=	less-than or equal-to
	>=	greater-than or equal-to
	??	null coalescing (choose first variable that's non-null,
		from left to right)

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VARIABLES
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All variables start like "$". Assignment is like this:

	$variable = "value";


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FUNCTIONS
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Make a function like a lot of languages:

	function FUNCTION_NAME($ARGUMENT, $ARGUMENT) {
		BLAH BLAH BLAH;
		return BLAH;
	}

... replace FUNCTION_NAME with the name, $ARGUMENT with a variable name,
etc. etc.

If you want an argument to be optional, assign it a default value, like:

	function FUNCTION_NAME($ARGUMENT = "default", $ARGUMENT = 2) {


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ARRAYS
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Make an array with 

	array(KEY=>VALUE, KEY=>VALUE);

VARIABLE can be a string or a number.

Get an array value like

	$array[KEY]


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GLOBAL VARIABLES
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There are some important global variables--

	$GET    	Hosts all GET data.
	$POST   	All POST data
	$SERVER  	SERVER data
	$GLOBALS	Contains all global vars.

They're all arrays.
Variables are local to their function-- and often, global variables from
certain functions won't be accessible in the global scope of another.

To reliably access (inter-file) globals, access them like values in an
array of $GLOBALS

	$GLOBALS[KEY]


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ETC.
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Really, most of PHP is really similar to other languages.
You should be able to read it pretty easily-- if there's something
you don't quite get, you can use the Wikibook

	https://en.wikibooks.org/wiki/PHP_Programming/

For quick reference. And for function definitions/examples, check the
PHP documentation

	https://secure.php.net/docs.php

Also Google loves you <3