variant_xor

(PHP 5, PHP 7, PHP 8)

variant_xor — Performs a logical exclusion on two variants

Beschreibung

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

Performs a logical exclusion.

Parameter-Liste

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

Hinweis:
Wie bei allen arithmetischen Variantfunktionen, können die Parameter dieser Funktion entweder native PHP-Typen (Integer, String, Fließkomma, Boolean oder null) oder Instanzen einer COM-, VARIANT- oder DOTNET-Klasse sein. Native PHP-Typen werden nach den gleichen Regeln in Varianten umgewandelt wie auch im Konstruktor der variant-Klasse. Für COM- und DOTNET-Objekte wird der Wert ihrer Standardeigenschaft genommen und als Variantenwert genutzt.

Die arithmetischen Variantenfunktionen sind Wrapper für die ähnlich benannten Funktionen der COM-Bibliothek, weiterführende Informationen hierzu finden sie in der MSDN-Bibliothek. Die PHP-Funktionen sind leicht abweichend benannt, so korrespondiert variant_add() in PHP zu VarAdd() in der MSDN-Dokumentation.

Rückgabewerte

**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`

Fehler/Exceptions

Throws a com_exception on failure.

Siehe auch

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

down

tinelbarb at yahoo dot com ¶

14 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 :-)

down

-1

tinelbarb at yahoo dot com ¶

14 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 :-)

down

-1

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

14 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 :-)

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