I need to add values from an array and compare them with a value coming from a variable.
Ex:
array(1000, 1000, 3000, 5000,);
$var = 4000;
In the case you must add 1000 + 3000 in the array, then you will find the 4000. The array positions will be random, the sum can be between 2,3,4, .. values.
Is it possible only with php?
I think this might help you. I found it here in the Stack Overflow .
$values = array(1000, 1000, 3000, 5000);
$expected = 4000;
$len = count( $values );
for( $i = 1; $i < pow( 2, $len ); $i++ ) {
$soma = 0;
$set = array();
for( $j = 0; $j < $len; $j++ ) {
if( 1 << $j & $i ) {
$set[] = $j;
$soma += $values[$j];
}
}
if( $soma == $expected ) {
// Estamos exibindo na tela apenas como demonstração.
foreach( $set as $pos ) echo "[$pos]{$values[$pos]} ";
echo " = $expected<br>\n";
}
}