如何遍历$ _POST传递每个帖子字段作为参数传递给函数? [英] How to loop through $_POST passing each post field as a parameter to a function?Edit

问题描述

我只是在算法上表示我想使用PHP中的foreach循环和$ _POST数组实现的目标.

I am just representing algorithmically what i want to achieve using a foreach loop and the $_POST array in php.

    function check_fields($_POST)
{
 // provide $_post['field1'],$_post['field2']..so on

  foreach($_POST as $_POST['FIELD 1-N'] 
{

 isvalid($_POST['FIELD1 - N']);
}
}

希望您能理解我要问的问题...

Hope you understand what I'm trying to ask...

$ _POST ['FIELD1']，$ _ POST ['FIELD1']等是传递给isvalid()函数的变量名称. isvalid()函数的作用是使用isset()并清空以检查变量是否包含值...

$_POST['FIELD1'], $_POST['FIELD1'] and so on are variable names that are passed to isvalid() function. What The isvalid() function does is use isset() and empty to check if the variable contains a value...

推荐答案

使用foreach，您不必知道数组中键的名称.

With foreach, you don't have to know the names of the keys in the array.

foreach($_POST as $key => $field) {
    isvalid($field);
}

$key包含诸如"field1"，"field2"之类的名称，而$field包含$_POST数组内部的值.然后，foreach循环将在每个字段值上运行函数invalid().

$key contains the names like "field1", "field2" and so on while $field contains the value inside the $_POST array. The foreach loop will then run the function invalid() on each of the field value.

要检查是否设置了字段值:

To check if the field values are set:

// Sample $_POST array
$_POST = array(
    "field1" => "", // this is not set
    "field2" => "data"
);
foreach($_POST as $key => $field) {
    // You can check if it is empty using foreach alone
    if (strlen($field) > 0) {
        // this field is set
    } else {
        // this field is not set
    }
}

您也可以使用empty()，但是它将"0"视为空，因此请小心.

You can use empty() as well but it treats "0" as empty so be careful.

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