|
Operator Description |
Example |
| + |
Addition - finds the sum of 2 values. print 3 + 3;//The
output will be: 6 |
| * |
Multiplication - Multiplies 2 values
print 2 * 3;//The output will be: 6 |
| - |
Subtraction - finds the difference between 2 values
print 6 - 3;//The output will be: 3 |
| / |
Division - Divides one value by another value
print 9 / 3;//The output will be: 3
|
| % |
Modulus - Divides one value by another value and returns
only the remainder ion the result.
print 7 % 5;//The output will be: 2 |
| . |
Concatenation - Combine values into a string.
$temp = "hot";
$myString = "It is " . $temp . " today.";
print $myString;//The output will be: It is hot today.
|
| ++value |
Pre-increment - Adds 1 to a value before the expression that
uses the value is processed.
$a = 5;
print ++$a;//The output will be: 6 |
| --value |
Pre-decrement - Subtracts 1 to a value before the expression
that uses the value is processed.
$a = 5;
print --$a;//The output will be: 4
|
| value++ |
Post-increment - Adds 1 to a value after the expression that
uses the value is processed.
$a = 5;
print $a++;print "<br>";
print $a;//The output will be: //5//6
|
| value-- |
Post-decrement - Subtracts 1 to a value after the expression
that uses the value is processed.
$a = 5;
print $a--;print "<br>";
print $a;//The output will be: //5//4 |
| = |
Assignment - Sets 1 value to another value.
$a = 3;
print $a;//The output will be: 3 |
| += |
Assignment - Adds 1 value to
another value.
$a = 3;
$a += 3;
print $a;//The output will be: 6 |
| -= |
Assignment - Subtracts 1 value
from another value.
$a = 3;
$a -= 1;
print $a;//The output will be: 2 |
| *= |
Assignment - Multiplies 1 value
by another value.
$a = 3;
$a *= 2;
print $a;//The output will be: 6 |
| /= |
Assignment - Divides 1 value by
another value.
$a = 6;
$a /= 2;
print $a;//The output will be: 3 |
| .= |
Assignment - Combines 2 values.
$a = "This is ";
$a .= "a test.";
print $a;//The output will be: This is a test |
| == |
Equal to - Checks if one value
is equal to another value.
$x = 7;
$y = "7";
if ($x == $y) print $x . " is equal to " . $y;
//The output will be: 7 is equal to 7 |
| === |
Identical to - Checks if one
value is equal to and of the same type as another value.
$x = 7;
$y = 7;
if ($x === $y) print $x . " is identical to " . $y;
//The output will be: 7 is identical to 7 |
| != |
Not equal to - Checks if one value is not equal to another
value.
$x = 8;
$y = 4;
if ($x != $y) print $x . " is not equal to " . $y;
//The output will be: 8 is not equal to 4 |
| !== |
Not identical to - Checks if 2
values are not equal to or of the same type.
$x = 8;
$y = 9;
if ($x != $y) print $x . " is not identical to " . $y;
//The output will be: 8 is not identical to 9 |
| < |
Less Than - Checks if 1 value
is less than another value.
$x = 5;
$y = 9;
if ($x < $y) print $x . " is less than " . $y;
//The output will be: 5 is less than 9 |
| > |
Greater Than - Checks if 1
value is greater than another value.
$x = 9;
$y = 5; if ($x > $y) print $x . " is less than " . $y;
//The output will be: 9 is less than 5 |
| <= |
Less Than or Equal to - Checks
if 1 value is less than or equal to another value.
$x = 5;
$y = 5; if ($x <= $y) print $x;
//The output will be: 5 |
| >= |
Greater Than or Equal to -
Checks if 1 value is greater than or equal to another value.
$x = 7;
$y = 5;
if ($x >= $y) print $x;
//The output will be: 7 |
| AND |
Checks if 2 or more statements
are true.
$x = 7;
$y = 5;
if (($x == 7) and ($y == 5)) print "true";
//The output will be: true |
| OR |
Checks if at least 1 of 2
statements is true.
$x = 7;
$y = 5;
if (($x == 7) or ($y == 8)) print "true";
//The output will be: true |
| XOR |
Checks if only 1 of 2
statements is true.
$x = 7;
$y = 5;
if (($x == 7) xor ($y == 8)) print "true";
//The output will be: true |
| ! |
Checks if the statements is not
true.
$y = 5;
if (! ($x == 10)) print "true";
//The output will be: true |
| && |
Checks if 2 or more statements
are both true.
$x = 7;
$y = 5;
if (($x == 7) && ($y == 5)) print "true";
//The output will be: true |
| || |
Checks if at least 1 of 2
statements is true.
$x = 7;
$y = 5;
if (($x == 7) || ($y == 5)) print "true";
//The output will be: true |
