Operators php
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The document discusses various types of operators in PHP including arithmetic, assignment, comparison, increment/decrement, logical, string, and array operators. It provides examples of common operators like addition, subtraction, equality checking, concatenation and describes what each operator does.
Operators php
- 1. Chandni P M Asst. Professor, Dept. of Computer Science R Sankar SNDP Yogam College, Koyilandy Operators of PHP
- 2. PHP Operators Operators are used to perform operations on variables and values. PHP divides the operators in the following groups: Arithmetic operators Assignment operators Comparison operators Increment/Decrement operators Logical operators String operators Array operators Conditional assignment operators
- 3. PHP Arithmetic Operators The PHP arithmetic operators are used with numeric values to perform common arithmetical operations, such as addition, subtraction, multiplication etc. Operator Name Example Result + Addition $x + $y Sum of $x and $y - Subtraction $x - $y Difference of $x and $y * Multiplication $x * $y Product of $x and $y / Division $x / $y Quotient of $x and $y % Modulus $x % $y Remainder of $x divided by $y ** Exponentiation $x ** $y Result of raising $x to the $y'th power
- 4. PHP Assignment Operators The PHP assignment operators are used with numeric values to write a value to a variable. The basic assignment operator in PHP is "=". It means that the left operand gets set to the value of the assignment expression on the right. Assignment Same as... Description x = y x = y The left operand gets set to the value of the expression on the right x += y x = x + y Addition & assignment x -= y x = x – y Subtraction & assignment x *= y x = x * y Multiplication & assignment x /= y x = x / y Division & assignment x %= y x = x % y Modulus & assignment
- 5. PHP Comparison Operators The PHP comparison operators are used to compare two values (number or string): Operator Name Example Result == Equal $x == $y Returns true if $x is equal to $y === Identical $x === $y Returns true if $x is equal to $y, and they are of the same type != Not equal $x != $y Returns true if $x is not equal to $y <> Not equal $x <> $y Returns true if $x is not equal to $y !== Not identical $x !== $y Returns true if $x is not equal to $y, or they are not of the same type > Greater than $x > $y Returns true if $x is greater than $y < Less than $x < $y Returns true if $x is less than $y >= Greater than or equal to $x >= $y Returns true if $x is greater than or equal to $y <= Less than or equal to $x <= $y Returns true if $x is less than or equal to $y ?: Ternary/Conditional Operator $big =($x>$y)?$x:$y
- 6. PHP Increment / Decrement Operators The PHP increment operators are used to increment a variable's value. The PHP decrement operators are used to decrement a variable's value. Operator Name Description ++$x Pre-increment Increments $x by one, then returns $x $x++ Post-increment Returns $x, then increments $x by one --$x Pre-decrement Decrements $x by one, then returns $x $x-- Post-decrement Returns $x, then decrements $x by one
- 7. PHP Logical Operators The PHP logical operators are used to combine conditional statements. Operator Name Example Result and And $x and $y True if both $x and $y are true or Or $x or $y True if either $x or $y is true xor Xor $x xor $y True if either $x or $y is true, but not both && And $x && $y True if both $x and $y are true || Or $x || $y True if either $x or $y is true ! Not !$x True if $x is not true << Shift left $x<<$y Shift the bits of $x , $y steps to the left >> Shift right $x>>$y Shift the bits of $x , $y steps to the right
- 8. PHP String Operators PHP has two operators that are specially designed for strings. Operator Name Example Result . Concatenation $txt1 . $txt2 Concatenation of $txt1 and $txt2 .= Concatenation assignment $txt1 .= $txt2 Appends $txt2 to $txt1 <?php $x = “Good “; $y = “Morning”; Echo $x.$y; $x.=$y; Echo $x; ?>