variant_xor

(PHP 5)

variant_xor — Performs a logical exclusion on two variants

Descrição

mixed variant_xor ( mixed $left , mixed $right )

Performs a logical exclusion.

Parâmetros

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

Nota:
Assim como todas as funções aritméticas variant, 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 será convertido para variants usando a mesma regra como encontrado no construtor para a classe VARIANT. Objetos COM e DOTNET terão o valor de suas propriedades padrão obtidos e usados como valor variant.

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

Veja Também

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

Printer

variant_sub

[edit] Last updated: Tue, 21 May 2013

add a note User Contributed Notes variant_xor - [3 notes]

down

tinelbarb at yahoo dot com ¶

2 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

tinelbarb at yahoo dot com ¶

2 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

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

2 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