Operators php

Operators php

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  Chandni P M Asst.Professor, Dept. of Computer Science R Sankar SNDP Yogam College, Koyilandy Operators of PHP
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  PHP Operators  Operatorsare 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
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  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
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  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
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  PHP Comparison Operators ThePHP 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:$y
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  PHP Increment /Decrement Operators  The PHP increment operators are used to increment a variable's value.  The PHP decrement operators are used to decrement a variable's value. Operator Name Description  ++$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
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  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
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  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; ?>