What is the logical "XOR" operator in PHP? When do you use it? What does it do?

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8

I wonder what that operator is XOR? When to use it? And what does it do in PHP?

php

2 answers

17


XOR is the operator of OR EXCLUSIVE. It is used when you want to verify the veracity of an expression OR other, exclusively.

Example: I have 2 hours a week to study either PHP or JAVA.

In this case, we are talking about exclusive operator. Either one or the other, never both.

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Note that if both are false or both are true, the XOR comparator will return false. It will only return true if only one of the conditions is true.

4

xor is a logical operator such as or and and. It returns true if the two operands are different, and false if the two are equal, both true and false.

A practical example is when you need a field to be selected, but never two at the same time, as in the case of sex: The user needs to select a sex, and never more than one (at least in most cases). An example in PHP:

<?php
  $masculino = true;
  $feminino  = false;

  if ($masculino xor $feminino) {
    print("Correto! Um sexo foi escolhido");
  } else {
    print("ERRO! Nenhum ou ambos sexos foram escolhidos.");
  }

See working on IDEONE.

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