variant_xor

(PHP 5, PHP 7)

variant_xorPerforms 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
TRUETRUEFALSE
TRUEFALSETRUE
FALSETRUETRUE
FALSEFALSEFALSE
NULLNULLNULL

참고

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

add a note add a note

User Contributed Notes 3 notes

up
2
tinelbarb at yahoo dot com
11 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
11 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
11 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 :-)
To Top