empty	get_defined_vars

	Last updated: Fri, 22 Jun 2007

floatval

(PHP 4 >= 4.2.0, PHP 5)

floatval -- 获取变量的浮点值

描述

float floatval ( mixed var)

返回变量 var 的 float 数值。

var 可以是任何标量类型。你不能将 floatval() 用于数组或对象。


<?php

$var = '122.34343The';

$float_value_of_var = floatval ($var);

print $float_value_of_var; // 打印出 122.34343

?>

参见 intval()、strval()、settype() 和类型戏法。

add a note User Contributed Notes
floatval

jason at shadonet dot com
08-Mar-2003 11:07

Instead of using floatval which only appeared in PHP 4.2 you could juse use
$variable = (float)$variable

This function doesn't seem to add any
functionality that wasn't already there.

add a note

empty	get_defined_vars

	Last updated: Fri, 22 Jun 2007

view source | feedback | send page | sitemap | aboutus