What is Operator? easy answer will be given mistreatment expression four + five is up to nine. Here four and five ar known as operands and + is termed operator. PHP language supports following sort of operators.
Arithmetic Operators
Comparison Operators
Logical (or Relational) Operators
Assignment Operators
Conditional (or ternary) Operators
Lets have a glance on all operators one by one.
Arithmetic Operators:
There ar following arithmetic operators supported by PHP language:
Assume variable A holds ten and variable B holds twenty then:
Show Examples
This will bring this result:
Comparison Operators:
There area unit following comparison operators supported by PHP language
Assume variable A holds ten and variable B holds twenty then:
Show Examples
It will show you this result:
Logical Operators:
There area unit following logical operators supported by PHP language
Assume variable A holds ten and variable B holds twenty then:
Show Examples
It will show you this result:
Assignment Operators:
There area unit following assignment operators supported by PHP language:
Show Examples
It will show you this result:
Conditional Operator
There is an added operator known as conditional operator. This initial evaluates Associate in Nursing expression for a real or false worth so execute one amongst the 2 given statements relying upon the results of the analysis. The conditional operator has this syntax:
Show Examples
It will show you this result:
Operators Categories:
All the operators we've got mentioned higher than will be categorized into following categories:
Unary prefix operators, that precede one quantity.
Binary operators, that take 2 operands and perform a range of arithmetic and logical operations.
The conditional operator (a ternary operator), that takes 3 operands and evaluates either the second or third expression, counting on the analysis of the primary expression.
Assignment operators, that assign a worth to a variable.
Precedence of PHP Operators:
Operator precedence determines the grouping of terms in associate degree expression. This affects however associate degree expression is evaluated. bound operators have higher precedence than others; for instance, the multiplication operator has higher precedence than the addition operator:
For example x = seven + three * 2; Here x is allotted thirteen, not twenty as a result of operator * has higher precedence than + therefore it 1st get increased with 3*2 and so adds into seven.
Here operators with the very best precedence seem at the highest of the table, those with all-time low seem at very cheap. inside associate degree expression, higher precedence operators are going to be evaluated 1st.
Arithmetic Operators
Comparison Operators
Logical (or Relational) Operators
Assignment Operators
Conditional (or ternary) Operators
Lets have a glance on all operators one by one.
Arithmetic Operators:
There ar following arithmetic operators supported by PHP language:
Assume variable A holds ten and variable B holds twenty then:
Show Examples
<html>
<head><title>Arithmetical Operators</title><head>
<body>
<?php
$a = 42;
$b = 20;
$c = $a + $b;
echo "Addtion Operation Result: $c <br/>";
$c = $a - $b;
echo "Substraction Operation Result: $c <br/>";
$c = $a * $b;
echo "Multiplication Operation Result: $c <br/>";
$c = $a / $b;
echo "Division Operation Result: $c <br/>";
$c = $a % $b;
echo "Modulus Operation Result: $c <br/>";
$c = $a++;
echo "Increment Operation Result: $c <br/>";
$c = $a--;
echo "Decrement Operation Result: $c <br/>";
?>
</body>
</html> |
This will bring this result:
Addtion Operation Result: 62 Substraction Operation Result: 22 Multiplication Operation Result: 840 Division Operation Result: 2.1 Modulus Operation Result: 2 Increment Operation Result: 42 Decrement Operation Result: 43
| Operator | Description | Example |
|---|---|---|
| + | Adds two operands | A + B will give 30 |
| - | Subtracts second operand from the first | A - B will give -10 |
| * | Multiply both operands | A * B will give 200 |
| / | Divide numerator by denumerator | B / A will give 2 |
| % | Modulus Operator and remainder of after an integer division | B % A will give 0 |
| ++ | Increment operator, increases integer value by one | A++ will give 11 |
| -- | Decrement operator, decreases integer value by one | A-- will give 9 |
Comparison Operators:
There area unit following comparison operators supported by PHP language
Assume variable A holds ten and variable B holds twenty then:
Show Examples
<html>
<head><title>Comparision Operators</title><head>
<body>
<?php
$a = 42;
$b = 20;
if( $a == $b ){
echo "TEST1 : a is equal to b<br/>";
}else{
echo "TEST1 : a is not equal to b<br/>";
}
if( $a > $b ){
echo "TEST2 : a is greater than b<br/>";
}else{
echo "TEST2 : a is not greater than b<br/>";
}
if( $a < $b ){
echo "TEST3 : a is less than b<br/>";
}else{
echo "TEST3 : a is not less than b<br/>";
}
if( $a != $b ){
echo "TEST4 : a is not equal to b<br/>";
}else{
echo "TEST4 : a is equal to b<br/>";
}
if( $a >= $b ){
echo "TEST5 : a is either grater than or equal to b<br/>";
}else{
echo "TEST5 : a is nieghter greater than nor equal to b<br/>";
}
if( $a <= $b ){
echo "TEST6 : a is either less than or equal to b<br/>";
}else{
echo "TEST6 : a is nieghter less than nor equal to b<br/>";
}
?>
</body>
</html>
It will show you this result:
TEST1 : a is not equal to b TEST2 : a is greater than b TEST3 : a is not less than b TEST4 : a is not equal to b TEST5 : a is either grater than or equal to b TEST6 : a is nieghter less than nor equal to b
| Operator | Description | Example |
|---|---|---|
| == | Checks if the value of two operands are equal or not, if yes then condition becomes true. | (A == B) is not true. |
| != | Checks if the value of two operands are equal or not, if values are not equal then condition becomes true. | (A != B) is true. |
| > | Checks if the value of left operand is greater than the value of right operand, if yes then condition becomes true. | (A > B) is not true. |
| < | Checks if the value of left operand is less than the value of right operand, if yes then condition becomes true. | (A < B) is true. |
| >= | Checks if the value of left operand is greater than or equal to the value of right operand, if yes then condition becomes true. | (A >= B) is not true. |
| <= | Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true. | (A <= B |
Logical Operators:
There area unit following logical operators supported by PHP language
Assume variable A holds ten and variable B holds twenty then:
Show Examples
<html>
<head><title>Logical Operators</title><head>
<body>
<?php
$a = 42;
$b = 0;
if( $a && $b ){
echo "TEST1 : Both a and b are true<br/>";
}else{
echo "TEST1 : Either a or b is false<br/>";
}
if( $a and $b ){
echo "TEST2 : Both a and b are true<br/>";
}else{
echo "TEST2 : Either a or b is false<br/>";
}
if( $a || $b ){
echo "TEST3 : Either a or b is true<br/>";
}else{
echo "TEST3 : Both a and b are false<br/>";
}
if( $a or $b ){
echo "TEST4 : Either a or b is true<br/>";
}else{
echo "TEST4 : Both a and b are false<br/>";
}
$a = 10;
$b = 20;
if( $a ){
echo "TEST5 : a is true <br/>";
}else{
echo "TEST5 : a is false<br/>";
}
if( $b ){
echo "TEST6 : b is true <br/>";
}else{
echo "TEST6 : b is false<br/>";
}
if( !$a ){
echo "TEST7 : a is true <br/>";
}else{
echo "TEST7 : a is false<br/>";
}
if( !$b ){
echo "TEST8 : b is true <br/>";
}else{
echo "TEST8 : b is false<br/>";
}
?>
</body>
</html>
It will show you this result:
TEST1 : Either a or b is false TEST2 : Either a or b is false TEST3 : Either a or b is true TEST4 : Either a or b is true TEST5 : a is true TEST6 : b is true TEST7 : a is false TEST8 : b is false
| Operator | Description | Example |
|---|---|---|
| and | Called Logical AND operator. If both the operands are true then then condition becomes true. | (A and B) is true. |
| or | Called Logical OR Operator. If any of the two operands are non zero then then condition becomes true. | (A or B) is true. |
| && | Called Logical AND operator. If both the operands are non zero then then condition becomes true. | (A && B) is true. |
| || | Called Logical OR Operator. If any of the two operands are non zero then then condition becomes true. | (A || B) is true. |
| ! | Called Logical NOT Operator. Use to reverses the logical state of its operand. If a condition is true then Logical NOT operator will make false. | !(A && B) i |
There area unit following assignment operators supported by PHP language:
Show Examples
<html>
<head><title>Assignment Operators</title><head>
<body>
<?php
$a = 42;
$b = 20;
$c = $a + $b; /* Assignment operator */
echo "Addtion Operation Result: $c <br/>";
$c += $a; /* c value was 42 + 20 = 62 */
echo "Add AND Assigment Operation Result: $c <br/>";
$c -= $a; /* c value was 42 + 20 + 42 = 104 */
echo "Subtract AND Assignment Operation Result: $c <br/>";
$c *= $a; /* c value was 104 - 42 = 62 */
echo "Multiply AND Assignment Operation Result: $c <br/>";
$c /= $a; /* c value was 62 * 42 = 2604 */
echo "Division AND Assignment Operation Result: $c <br/>";
$c %= $a; /* c value was 2604/42 = 62*/
echo "Modulus AND Assignment Operation Result: $c <br/>";
?>
</body>
</html>
|
It will show you this result:
Addtion Operation Result: 62 Add AND Assigment Operation Result: 104 Subtract AND Assignment Operation Result: 62 Multiply AND Assignment Operation Result: 2604 Division AND Assignment Operation Result: 62 Modulus AND Assignment Operation Result: 20 |
| Operator | Description | Example |
|---|---|---|
| = | Simple assignment operator, Assigns values from right side operands to left side operand | C = A + B will assigne value of A + B into C |
| += | Add AND assignment operator, It adds right operand to the left operand and assign the result to left operand | C += A is equivalent to C = C + A |
| -= | Subtract AND assignment operator, It subtracts right operand from the left operand and assign the result to left operand | C -= A is equivalent to C = C - A |
| *= | Multiply AND assignment operator, It multiplies right operand with the left operand and assign the result to left operand | C *= A is equivalent to C = C * A |
| /= | Divide AND assignment operator, It divides left operand with the right operand and assign the result to left operand | C /= A is equivalent to C = C / A |
| %= | Modulus AND assignment operator, It takes modulus using two operands and assign the result to left operand | C %= A |
Conditional Operator
There is an added operator known as conditional operator. This initial evaluates Associate in Nursing expression for a real or false worth so execute one amongst the 2 given statements relying upon the results of the analysis. The conditional operator has this syntax:
Show Examples
<html>
<head><title>Arithmetical Operators</title><head>
<body>
<?php
$a = 10;
$b = 20;
/* If condition is true then assign a to result otheriwse b */
$result = ($a > $b ) ? $a :$b;
echo "TEST1 : Value of result is $result<br/>";
/* If condition is true then assign a to result otheriwse b */
$result = ($a < $b ) ? $a :$b;
echo "TEST2 : Value of result is $result<br/>";
?>
</body>
</html>
It will show you this result:
TEST1 : Value of result is 20 TEST2 : Value of result is 10
| Operator | Description | Example |
|---|---|---|
| ? : | Conditional Expression | If Condition is true ? Then value X : Otherwise value Y |
All the operators we've got mentioned higher than will be categorized into following categories:
Unary prefix operators, that precede one quantity.
Binary operators, that take 2 operands and perform a range of arithmetic and logical operations.
The conditional operator (a ternary operator), that takes 3 operands and evaluates either the second or third expression, counting on the analysis of the primary expression.
Assignment operators, that assign a worth to a variable.
Precedence of PHP Operators:
Operator precedence determines the grouping of terms in associate degree expression. This affects however associate degree expression is evaluated. bound operators have higher precedence than others; for instance, the multiplication operator has higher precedence than the addition operator:
For example x = seven + three * 2; Here x is allotted thirteen, not twenty as a result of operator * has higher precedence than + therefore it 1st get increased with 3*2 and so adds into seven.
Here operators with the very best precedence seem at the highest of the table, those with all-time low seem at very cheap. inside associate degree expression, higher precedence operators are going to be evaluated 1st.
| Category | Operator | Associativity |
|---|---|---|
| Unary | ! ++ -- | Right to left |
| Multiplicative | * / % | Left to right |
| Additive | + - | Left to right |
| Relational | < <= > >= | Left to right |
| Equality | == != | Left to right |
| Logical AND | && | Left to right |
| Logical OR | || | Left to right |
| Conditional | ?: | Right to left |
| Assignment | = += -= *= /= %= | Right to left |
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