```PHP

Variables:
\$x=5;
\$word="hello";

Printing:
echo "This is a sentence";
print "The value is \$x";

Comparison Operators:

== (equals)
!= (not equals)
> (greater than)
< (less than)
>= (greater than or equal to)
<= (less than or equal to)

Logical Operators

Example	        Name	Result
\$a and \$b	And	TRUE if both \$a and \$b are TRUE.
\$a or \$b	Or	TRUE if either \$a or \$b is TRUE.
\$a xor \$b	Xor	TRUE if either \$a or \$b is TRUE, but not both.
! \$a	        Not	TRUE if \$a is not TRUE.
\$a && \$b	And	TRUE if both \$a and \$b are TRUE.
\$a || \$b	Or	TRUE if either \$a or \$b is TRUE.

Conditional statements:

if(\$x > 5) {
print "\$x is greater than 5";
}
if(\$word == "hello") {
print "The word is hello";
}
else {
print "The word is not hello";
}

For loops:

for(\$i=starting number; \$i<=ending number; \$i++) {
//Everything between these braces is repeated
}

//start at 0; end at 30; add 1 to \$i each time
for(\$i=0; \$i<=30; \$i++) {
echo "i is currently \$i";
}
//start at 1; end at 19; add 5 to \$i each time

for(\$i=1; \$i<20; \$i=\$i+5) {
echo "i is currently \$i";
}

Declaring Functions:

function subtract(\$x, \$y) {
\$value = \$x-\$y;
return \$value;
}

function print_hello() {
echo "Hello World";
}

Using Functions:

\$result=\$subtract(10,5);
echo "\$result ";
print_hello();

```