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

add a note

User Contributed Notes 3 notes

up
1
tinelbarb at yahoo dot com
15 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.<?phpfunction a_xor_b($a=0, $b=0) {    return ( ($a!=$b) && ($a||$b) ) ? TRUE : FALSE ;}?>If using this function, make sure you use the same type for arguments ;-)Here is a sample code using it:<?phpif ( a_xor_b(strlen($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
15 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.<?phpfunction a_xor_b($a=0, $b=0) {    return ( ($a!=$b) && ($a||$b) ) ? TRUE : FALSE ;}?>If using this function, make sure you use the same type for arguments ;-)Here is a sample code using it:<?phpif ( a_xor_b(strlen($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
15 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.<?phpfunction a_xor_b($a=0, $b=0) {    return ( ($a!=$b) && ($a||$b) ) ? TRUE : FALSE ;}?>If using this function, make sure you use the same type for arguments ;-)Here is a sample code using it:<?phpif ( a_xor_b(strlen($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 :-)
To Top