Operator

Example

Explanation

=

$cow = "moo"

This does not mean "equal to"; This is assigning a value (moo) to the variable ($cow)
$cow now represents moo.

.=

$cow .= ", says the cow"

This adds ", says the cow" on to the end of whatever the variable equaled before. (you may also use math operators instead of the ".")

Operator/Example

Name

Explanation

$a + $b

Addition

Sum of $a and $b.

$a - $b

Subtraction

Difference of $a and $b.

$a * $b

Multiplication

Product of $a and $b.

$a / $b

Division

Quotient of $a and $b.

$a % $b

Modulus

Remainder of $a divided by $b.

Operator/Example

Name

Explanation

$a == $b

Equal

TRUE if $a is equal to $b.

$a === $b

Identical

TRUE if $a is equal to $b, and they are of the same type. (PHP 4 only)

$a != $b

Not equal

TRUE if $a is not equal to $b.

$a <> $b

Not equal

TRUE if $a is not equal to $b.

$a !== $b

Not identical

TRUE if $a is not equal to $b, or they are not of the same type. (PHP 4 only)

$a < $b

Less than

TRUE if $a is strictly less than $b.

$a > $b

Greater than

TRUE if $a is strictly greater than $b.

$a <= $b

Less than or equal to

TRUE if $a is less than or equal to $b.

$a >= $b

Greater than or equal to

TRUE if $a is greater than or equal to $b.

1 < $a < 3

Between

TRUE if $a is strictly between the two values on either side.

1 <= $a <= 3

Between

RUE if $a is between or equal to the two values on either side.

Operator/Example

Name

Explanation

$a and $b

And

TRUE if both $a and $b are TRUE.

$a or $b

Or

TRUE if either $a or $b or both are 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 or both are TRUE.

$a ^^ $b

Xor

TRUE if either $a or $b is TRUE, but not both.

Code

Example

Explanation

//

//This explains what the code says...

This way of commenting is good for only one line... anything after the "//" will not be parsed.

/* */

/* this will all
be commented
out */

Using this way of commenting, you can comment out multiple lines of coding.

Code

Meaning

Explanation

\n

linefeed

This pretty much is the PHP equivalent to <br> in html

\t

horizontal tab

Does what it says, add a space before the content you add after

\"

double quote

This is how you add a quote if you want it to show up as text, otherwise its treated as PHP code.

\$

dollar sign

This is how you show a dollar sign if you want it to be test, otherwise its treated as PHP code.