I m following some exercises about data validation and decided to mess around with the filter_input() function. When I try to run this code:
$_POST[ var ] = 10;
$filtered = filter_input(INPUT_POST, var , FILTER_VALIDATE_FLOAT);
var_dump($filtered);
var_dump(过滤费用) Return NUL. 我知道,如果通过提交表格来分配<代码>_$_POST[ var]的价值,那么I m只是想知道,为什么人工将价值分配到<代码>_POST[]上?
filter_input(>.n t宣读了_POST/_GET/_COOKIE/_SERVER/_ENV超级全球阵列。 它分别从这些价值观的原始来源(这些来源也用来为超级全球化人口居住)。
This is because INPUT_POST works on the original POST values, modifications to them in your script have no effect.
However, if you want to filter that var you can use:
filter_var($_POST[ var ], FILTER_VALIDATE_FLOAT);
如果你想要设定默认输入值和过滤器,则使用<代码>filter_var。 由于过滤-投入,t 过滤了超级全球化的现值。
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