variant_xor

(PHP 5, PHP 7, PHP 8)

variant_xor — Performs a logical exclusion on two variants

Descrição

variant_xor ( mixed $left , mixed $right ) : variant

Performs a logical exclusion.

Parâmetros

left: The left operand.
right: The right operand.

Nota:
Assim como todas as funções aritméticas, os parâmetros para esta função podem ser qualquer um tipo nativo do PHP (integer, string, ponto flutuante, booleano ou null), ou uma instancia de uma classe COM, VARIANT ou DOTNET. Tipos nativos do PHP serão convertidos para variants usando as mesmas regras como mencionadas no construtor da classe variant. Objetos COM e DOTNET terão o valor de suas propriedades padrão obtidos e usados como um valor variant.

As funções aritméticas variant são wrappers para funções chamadas similarmente na biblioteca COM; para mais informação sobre estas funções, consulte o MSDN. As funções PHP são nomeadas ligeiramente diferentes; por exemplo variant_add() no PHP corresponde à VarAdd() na documentação MSDN.

Valor Retornado

**Variant XOR Rules**
If `left` is	If `right` is	then the result is
`true`	`true`	`false`
`true`	`false`	`true`
`false`	`true`	`true`
`false`	`false`	`false`
`null`	`null`	`null`

Erros

Throws a com_exception on failure.

Veja Também

variant_or() - Performs a logical disjunction on two variants
variant_and() - Performs a bitwise AND operation between two variants

add a note

User Contributed Notes 3 notes

down

tinelbarb at yahoo dot com ¶

13 years ago


I've been using a lot the VARIANT_XOR function (all the VARIANT functions ar cool) and I was faceing the problem that some custom copilation of PHP, especially LAMP packs, doesn't have the VARANT functions included, so the scripts halts.
I had to find an alternative for those who doesn't have an implamentation of VARIANT_XOR.
I'd love if somebody improve my "A_XOR_B" function by changing the name in "VARIANT_XOR" and to run the original VARIANT_XOR function (being optimized) if it is already in the PHP compilation, else run the custom XOR code.

<?php
function a_xor_b($a=0, $b=0) {
    return ( ($a!=$b) && ($a||$b) ) ? TRUE : FALSE ;
}
?>

If using this function, make sure you use the same type for arguments ;-)

Here is a sample code using it:

<?php
if ( a_xor_b(strlen($column1)>0,strlen($column2)>0) ) {
  $add_and='';
}
if ( !a_xor_b(strlen($column1)>0,strlen($column2)>0 ) && strlen($column1)>0 ) {
  $add_and=' and ';
}
$some_sql_filter=$query_str.' having '.$column1.$add_and.$column2;
?>

The use of VARIANT_XOR was identical.

@PHP TEAM: the VARIANT set is so great :-)

down

-1

tinelbarb at yahoo dot com ¶

13 years ago


I've been using a lot the VARIANT_XOR function (all the VARIANT functions ar cool) and I was faceing the problem that some custom copilation of PHP, especially LAMP packs, doesn't have the VARANT functions included, so the scripts halts.
I had to find an alternative for those who doesn't have an implamentation of VARIANT_XOR.
I'd love if somebody improve my "A_XOR_B" function by changing the name in "VARIANT_XOR" and to run the original VARIANT_XOR function (being optimized) if it is already in the PHP compilation, else run the custom XOR code.

<?php
function a_xor_b($a=0, $b=0) {
    return ( ($a!=$b) && ($a||$b) ) ? TRUE : FALSE ;
}
?>

If using this function, make sure you use the same type for arguments ;-)

Here is a sample code using it:

<?php
if ( a_xor_b(strlen($column1)>0,strlen($column2)>0) ) {
  $add_and='';
}
if ( !a_xor_b(strlen($column1)>0,strlen($column2)>0 ) && strlen($column1)>0 ) {
  $add_and=' and ';
}
$some_sql_filter=$query_str.' having '.$column1.$add_and.$column2;
?>

The use of VARIANT_XOR was identical.

@PHP TEAM: the VARIANT set is so great :-)

down

-1

tinelbarb at yahoo dot com dot RE-MO-VE dot ME ¶

13 years ago


I've been using a lot the VARIANT_XOR function (all the VARIANT functions ar cool) and I was faceing the problem that some custom copilation of PHP, especially LAMP packs, doesn't have the VARANT functions included, so the scripts halts.
I had to find an alternative for those who doesn't have an implamentation of VARIANT_XOR.
I'd love if somebody improve my "A_XOR_B" function by changing the name in "VARIANT_XOR" and to run the original VARIANT_XOR function (being optimized) if it is already in the PHP compilation, else run the custom XOR code.

<?php
function a_xor_b($a=0, $b=0) {
    return ( ($a!=$b) && ($a||$b) ) ? TRUE : FALSE ;
}
?>

If using this function, make sure you use the same type for arguments ;-)

Here is a sample code using it:

<?php
if ( a_xor_b(strlen($column1)>0,strlen($column2)>0) ) {
  $add_and='';
}
if ( !a_xor_b(strlen($column1)>0,strlen($column2)>0 ) && strlen($column1)>0 ) {
  $add_and=' and ';
}
$some_sql_filter=$query_str.' having '.$column1.$add_and.$column2;
?>

The use of VARIANT_XOR was identical.

@PHP TEAM: the VARIANT set is so great :-)

add a note