note 109968 deleted from language.types.float by danbrown
| From: | danbrown@php.net | Date: | Thu, 06 Sep 2012 16:52:44 +0000 |
| Subject: | note 109968 deleted from language.types.float by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-190541@lists.php.net to get a copy of this message | ||
Note Submitter: ameggiolaro2003 at yahoo dot com dot br
----
/**
* Comparação de números do tipo FLOAT
*
* @param float $a - número 1
* @param string $op - operação [ == | != ]
* @param float $b - número 2
* @param float $epsilon - limiar de comparação
* @return boolean
* @see http://stackoverflow.com/questions/3148937/compare-floats-in-php
* @see http://php.net/manual/en/language.types.float.php
*/
function float_compare($a, $op, $b, $epsilon = 0.00001) {
$abs = abs($a - $b);
$return = null;
$accepted_op = array(
'==', '===',
'!=', '!=='
);
if (!in_array($op, $accepted_op)) {
die('float_compare: $op aceita somente:' . implode('|', $accepted_op));
}
switch ($op) {
case '==' :
case '===' : {
$return = ($abs < $epsilon);
break;
}
case '!=' :
case '!==' : {
$return = ($abs > $epsilon);
break;
}
}
return $return;
}
var_dump(float_compare(456987.27, '==', 456987.27000001)); // TRUE