variant_xor

(PHP 5)

variant_xor — Performs a logical exclusion on two variants

설명

mixed variant_xor ( mixed $left , mixed $right )

Performs a logical exclusion.

인수

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

Note:
variant 연산 함수와 마찬가지로, 이 함수의 인수로는 PHP 자료형(정수, 문자열, 소수, 논리, NULL)이나 COM, VARIANT, DOTNET 클래스의 인스턴스를 사용할 수 있습니다. PHP 자료형은 VARIANT 클래스 생성자와 같은 방식으로 vriant로 변환됩니다. COM과 DOTNET 객체는 기본 프로퍼티 값을 variant 값으로 사용합니다.
variant 연산 함수는 비슷한 이름의 COM 라이브러리 함수의 래퍼입니다; 이 함수들에 관한 자세한 정보는 MSDN 라이브러리를 참조하십시오. PHP 함수 이름은 차이가 있습니다; 예를 들어, PHP에서 variant_add()는 MSDN 문서의 VarAdd()에 해당합니다.

반환값

**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`

참고

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: Sat, 07 Jan 2012

add a note User Contributed Notes variant_xor

tinelbarb at yahoo dot com 30-Aug-2010 12:21


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 :-)

tinelbarb at yahoo dot com 30-Aug-2010 12:20


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 :-)

tinelbarb at yahoo dot com dot RE-MO-VE dot ME 30-Aug-2010 12:20


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