Redondear con precisión con PHP
PHP dispone de una función para hacer redondeos con precisión. Se trata de la función round() que tiene la siguiente estructura:
float round ( float $val [, int $precision = 0 [, int $mode = PHP_ROUND_HALF_UP ]] )
Esta función la podemos utilizar en casos como los siguientes:
<?php echo round(3.4); // 3 echo round(3.5); // 4 echo round(3.6); // 4 echo round(3.6, 0); // 4 echo round(1.95583, 2); // 1.96 echo round(1241757, -3); // 1242000 echo round(5.045, 2); // 5.05 echo round(5.055, 2); // 5.06 ?>
O también podríamos utilizar sus constantes:
<?php echo round(9.5, 0, PHP_ROUND_HALF_UP); // 10 echo round(9.5, 0, PHP_ROUND_HALF_DOWN); // 9 echo round(9.5, 0, PHP_ROUND_HALF_EVEN); // 10 echo round(9.5, 0, PHP_ROUND_HALF_ODD); // 9 echo round(8.5, 0, PHP_ROUND_HALF_UP); // 9 echo round(8.5, 0, PHP_ROUND_HALF_DOWN); // 8 echo round(8.5, 0, PHP_ROUND_HALF_EVEN); // 8 echo round(8.5, 0, PHP_ROUND_HALF_ODD); // 9 ?>
Autor
Escrito por Jose Aguilar - Director ejecutivo y tecnológico en JA Modules. Experto programador PrestaShop y Experto programador WordPress.
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