variant_sub
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.$column2;
?>
The use of VARIANT_XOR was identical.
@PHP TEAM: the VARIANT set is so great :-)
variant_xor
(PHP 5)
variant_xor — 2 つの variant の排他的論理和を計算する
パラメータ
-
left -
左オペランド。
-
right -
右オペランド。
注意:
variant に関するすべての計算用関数と同様、この関数のパラメータには PHP のネイティブ型 (整数、文字列、浮動小数点数、boolean あるいは
NULL) あるいは COM、VARIANT、DOTNET クラスのインスタンスが使用できます。 PHP のネイティブ型は、VARIANT クラスのコンストラクタと同じ方法で variant に変換されます。 COM オブジェクトおよび DOTNET オブジェクトはデフォルトプロパティの値を持っており、 これを variant の値として使用します。variant に関する計算関数は、COM ライブラリの同名の関数のラッパーです。 これらの関数についての詳細な情報は、MSDN ライブラリでご確認ください。 PHP での関数名は微妙に異なります。たとえば、PHP での関数 variant_add() に対応する関数は、MSDN のドキュメントでは VarAdd() となります。
返り値
left |
right |
結果 |
|---|---|---|
TRUE | TRUE | FALSE |
TRUE | FALSE | TRUE |
FALSE | TRUE | TRUE |
FALSE | FALSE | FALSE |
NULL | NULL | NULL |
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User Contributed Notes
variant_xor - [3 notes]
tinelbarb at yahoo dot com ¶
2 years ago
tinelbarb at yahoo dot com ¶
2 years ago
I've been using a lot the VARIANT_XOR function (all the VARIANT functions ar cool) and I was faceing the problem that some custom copilation of PHP, especially LAMP packs, doesn't have the VARANT functions included, so the scripts halts.
I had to find an alternative for those who doesn't have an implamentation of VARIANT_XOR.
I'd love if somebody improve my "A_XOR_B" function by changing the name in "VARIANT_XOR" and to run the original VARIANT_XOR function (being optimized) if it is already in the PHP compilation, else run the custom XOR code.
<?php
function a_xor_b($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.$column2;
?>
The use of VARIANT_XOR was identical.
@PHP TEAM: the VARIANT set is so great :-)
tinelbarb at yahoo dot com dot RE-MO-VE dot ME ¶
2 years ago
I've been using a lot the VARIANT_XOR function (all the VARIANT functions ar cool) and I was faceing the problem that some custom copilation of PHP, especially LAMP packs, doesn't have the VARANT functions included, so the scripts halts.
I had to find an alternative for those who doesn't have an implamentation of VARIANT_XOR.
I'd love if somebody improve my "A_XOR_B" function by changing the name in "VARIANT_XOR" and to run the original VARIANT_XOR function (being optimized) if it is already in the PHP compilation, else run the custom XOR code.
<?php
function a_xor_b($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 :-)