Initial commit for public repo

code/comparisons.php

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+<?php
+
+// A boolean is a value that is always 0 or 1, yes or no, on or off.
+// In PHP, a boolean is represented by the words true and false.
+// While programming, you will often want to know if something is true or false.
+$a = true;
+$b = false;
+
+// There are many constructs and functions that will return a boolean.
+// To start, let's look at comparisons.
+$one = 1;
+$two = 2;
+
+// Double equals checks if two values are equal.
+// This statement will return false.
+$one == $two;
+
+// An exclamation point and equal sign check if two values are not equal.
+// This statement will return true.
+$one != $two;
+
+// You can use greater than and less than symbols to check for comparisons too.
+// This statement will return false.
+$one > $two;
+
+// This statement will return true.
+$one < $two;
+
+// If you combine a greater than or less than symbol with an equal,
+// it will check if the value is greater or less than or equal to another value.
+$one <= $two;
+$one >= $two;
+
+// You can also check that two values are equal and of the same type
+// by using three equal signs.
+
+// This returns true.
+1 == '1';
+
+// This returns false.
+1 === '1';