PHP FILTER_SANITIZE_NUMBER_FLOAT 過濾器
定義和用法
FILTER_SANITIZE_NUMBER_FLOAT 過濾器刪除浮點數中所有非法的字符。
該過濾器默認允許所有數字以及+ -
- Name: "number_float"
- ID-number: 520
可能的標誌:
- FILTER_FLAG_ALLOW_FRACTION - 允許小數分隔符(比如.)
- FILTER_FLAG_ALLOW_THOUSAND - 允許千位分隔符(比如,)
- FILTER_FLAG_ALLOW_SCIENTIFIC - 允許科學記數法(比如e 和E)
實例
<?php
$number="5-2f+3.3pp";
var_dump(filter_var($number, FILTER_SANITIZE_NUMBER_FLOAT,
FILTER_FLAG_ALLOW_FRACTION));
?>
$number="5-2f+3.3pp";
var_dump(filter_var($number, FILTER_SANITIZE_NUMBER_FLOAT,
FILTER_FLAG_ALLOW_FRACTION));
?>
代碼的輸出如下所示:
string(7) "5-2+3.3"
完整的PHP Filter參考手冊