php 打印 $_POST 变量名和值
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Print $_POST variable name along with value
提问by Joseph U.
I have a POST in PHP for which I won't always know the names of the variable fields I will be processing.
我在 PHP 中有一个 POST，我并不总是知道我将处理的变量字段的名称。
I have a function that will loop through the values (however I would also like to capture the variable name that goes with it.)
我有一个函数可以遍历这些值（但是我也想捕获与之配套的变量名称。）
foreach ($_POST as $entry)
{
print $entry . "<br>";
}
Once I figure out how to grab the variable names, I also need to figure out how I can make the function smart enough to detect and loop through arrays for a variable if they are present (i.e. if I have some checkbox values.)
一旦我弄清楚如何获取变量名称，我还需要弄清楚如何使函数足够智能，以检测和循环变量是否存在数组（即，如果我有一些复选框值。）
回答by Michael Robinson
If you just want to print the entire $_POST array to verify your data is being sent correctly, use print_r:
如果您只想打印整个 $_POST 数组以验证您的数据是否正确发送，请使用print_r：
print_r($_POST);
To recursively print the contents of an array:
要递归打印数组的内容：
printArray($_POST);
function printArray($array){
foreach ($array as $key => $value){
echo "$key => $value";
if(is_array($value)){ //If $value is an array, print it as well!
printArray($value);
}
}
}
Apply some padding to nested arrays:
对嵌套数组应用一些填充：
printArray($_POST);
/*
* $pad='' gives $pad a default value, meaning we don't have
* to pass printArray a value for it if we don't want to if we're
* happy with the given default value (no padding)
*/
function printArray($array, $pad=''){
foreach ($array as $key => $value){
echo $pad . "$key => $value";
if(is_array($value)){
printArray($value, $pad.' ');
}
}
}
is_arrayreturns true if the given variable is an array.
如果给定的变量是一个数组，is_array返回 true。
You can also use array_keys which will return all the string names.
您还可以使用 array_keys 返回所有字符串名称。
回答by Jeffrey Blake
You can have the foreach loop show the index along with the value:
您可以让 foreach 循环显示索引和值：
foreach ($_POST as $key => $entry)
{
print $key . ": " . $entry . "<br>";
}
As to the array checking, use the is_array()function:
至于数组检查，使用is_array()函数：
foreach ($_POST as $key => $entry)
{
if (is_array($entry)) {
foreach($entry as $value) {
print $key . ": " . $value . "<br>";
}
} else {
print $key . ": " . $entry . "<br>";
}
}
回答by ascci
It's much better to use:
最好使用：
if (${'_'.$_SERVER['REQUEST_METHOD']}) {
$kv = array();
foreach (${'_'.$_SERVER['REQUEST_METHOD']} as $key => $value) {
$kv[] = "$key=$value";
}
}
回答by silvo
If you want to detect array fields use a code like this:
如果要检测数组字段，请使用如下代码：
foreach ($_POST as $key => $entry)
{
if (is_array($entry)){
print $key . ": " . implode(',',$entry) . "<br>";
}
else {
print $key . ": " . $entry . "<br>";
}
}
