# PHP Tutorial – Operators

In this PHP programming tutorial we will look at PHP operators. An operator is something that can be used to do operations on values to get a new value. We will look at: Arithmetic, Assignment, Logical, Comparison and Concatenation (string) Operators.

## Assignment Operators

Assignment operators are used to set a variable equal to a value or set a variable by doing an arithmetic operation on itself and another value.

Operator | Examples | Large notation |
---|---|---|

+= | x+=y | x=x+y |

-= | x-=y | x=x-y |

= | x=y | x=y |

*= | x*=y | x=x*y |

/= | x/=y | x=x/y |

.= | x.=y | x=x.y |

%= | x%=y | x=x%y |

## Arithmetic Operators

Operator | Description | Example | Result |
---|---|---|---|

+ | Addition | x=5 x+2 |
7 |

– | Subtraction | x=6 10-x |
4 |

/ | Division | 20/5 | 4 |

* | Multiplication | x=4 x*5 |
20 |

++ | Increment | x=5 x++ |
x=6 |

— | Decrement | x=5 x– |
x=4 |

% | Modulus (division remainder) | 10%8 | 2 |

## Logical Operators

Operator | Description | Example |
---|---|---|

&& | and | x=5 y=5 (x < 10 && y > 1) returns true |

|| | or | x=5 y=5 (x==5 || y==5) returns true |

! | not | x=5 y=5 !(x==y) returns false |

## Comparison Operators

Operator | Description | Example |
---|---|---|

== | is equal to | 1==2 returns false |

!= | is not equal | 1!=2 returns true |

<> | is not equal | 1<>2 returns true |

< | is less than | 1<2 returns true |

> | is greater than | 1>2 returns false |

<= | is less than or equal to | 1<=2 returns true |

>= | is greater than or equal to | 1>=2 returns false |

## Concatenation Operator or String Operator

The PHP language has only one string operator. If you want to put two string values together you can use the concatenation operator (.) Take a look at the **PHP String Variables tutorial for a concatenation (string) operator example**.

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