PHP Operators
PHP support for operators
includes the following:
Arithmetic Operators
$a = 4;
$b = 2;
//Addition: $a + b = 6
//Subtraction: $a - $b = 2
//Multiplication: $a * $b = 8
//Division :$a / $b = 2
//Modulus (remainder of $a / $b):
$a % $b = 0
//Increment: $a++ (would equal 5
since $a = 4)
Assignment Operators
The two main assignment operators
in php are "=" and
".". The equals sign
should be obvious; it assigns
a value to a variable:
$a = 4;
$b = $a;
// $b = 4
Comparison Operators
PHP supports the standard comparison
operators:
$a == $b: test if two values
are equal
$a != $b: test if two values
are not equal
$a < $b: test if the first
value is less than the second
$a > $b: test if the first
value is greater than the second
$a <= $b: test if the first
value is less than or equal
to the second
$a >= $b: test if the first
value is greater than or equal
to the second
Increment
& Decrement Operators
PHP also supports the standard
increment and decrement operators:
$a = 5;
$a++;
// $a = 6
$b = 5;
$b--;
//$b = 4
$a += 2;
//$a = 8
$b -= 2;
//$b = 2
Concatenating
Strings
The "." operator concatenates
two values:
$sentence_a = "The quick
brown ";
$sentence_b = "fox jumped...";
$sentence_c = $a . $b;
//$sentence_c = "The quick
brown fox jumped...";
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