variant_xor

(PHP 5, PHP 7, PHP 8)

variant_xorPerforms a logical exclusion on two variants

Descripción

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

Performs a logical exclusion.

Parámetros

left

The left operand.

right

The right operand.

Nota:

Al igual que con todas las funciones aritméticas variantes, los parámetros de esta función pueden ser tanto un tipo nativo de PHP (integer, string, de punto flotante, boolean o null), o una instancia de una clase COM, VARIANT o DOTNET. Los tipos nativos de PHP serán convertidos en variantes usando las mismas reglas tal como se encuentran en el constructor para la clase variant. Los objetos COM y DOTNET tomarán el valor de sus propiedades predeterminadas adoptadas y lo utilizarán como el valor variante.

Las funciones aritméticas variantes son wrappers alrededor de las funciones con nombres similares en la librería COM; para más información sobre estas funciones, consulte la librería MSDN. Las funciones de PHP tienen nombres ligeramente diferentes; por ejemplo, variant_add() en PHP corresponde a VarAdd() en la documentación MSDN.

Valores devueltos

Variant XOR Rules
If left is If right is then the result is
truetruefalse
truefalsetrue
falsetruetrue
falsefalsefalse
nullnullnull

Errores/Excepciones

Throws a com_exception on failure.

Ver también

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

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User Contributed Notes 3 notes

up
2
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 :-)
up
-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 :-)
up
-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 :-)
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