- var_dump: documentation ( source)
- abs: documentation ( source)
- array_search: documentation ( source)
- min: documentation ( source)
<?php
function roundToValues( $tax, array $possibleTaxes ) {
$differences = array();
foreach( $possibleTaxes as $possibleTax) {
$differences[ $possibleTax ] = abs($possibleTax - $tax);
}
return array_search(min($differences), $differences);
}
$possibleTaxes = array(
'0' => '0',
'20' => '0-20',
'50' => '20-50',
'100' => '50-100',
'200' => '100-200',
'500' => '200-500',
);
var_dump( roundToValues('199.99',$possibleTaxes) );
?>