My way to create php array and variables from a json post

create_dynamic_variables_fom_post.php

<?php
    $post_string = file_get_contents("php://input");
    if (!empty($post_string))
    $post_data= json_decode($post_string, true);
	}

if (isset($post_data) and is_array($post_data)){
	foreach($post_data as $post_key => $post_value){
		${str_name($post_key)} = $post_value;
		if (is_array($post_value)){
			foreach($post_value as $ex_key => $ex_value ){
				${str_name($ex_key)} = $ex_value;	
				if(is_array($ex_value)){
					foreach ($ex_value as $exx_key => $exx_value) {
						${str_name($exx_key)} = $exx_value;
						if(is_array($exx_value)){
							foreach($exx_value as $exxx_key => $exxx_value) {
								${str_name($exxx_key)} = $exxx_value;
								if(is_array($exxx_value)){
									foreach($exxx_value as $exxxx_key => $exxxx_value) {
										${str_name($exxxx_key)} = $exxxx_value;
										if(is_array($exxxx_value)){
											foreach($exxxx_value as $exxxxx_key => $exxxxx_value) {
													${str_name($exxxxx_key)} = $exxxxx_value;
											} // foreach($exxxxx_value)
										} // if(is_array($exxxxx_value))
									} // foreach($exxx_value)
								} // if(is_array($exxx_value))
							} //foreach($exx_value)
						} //if(is_array($exx_value))
					} // foreach ($ex_value)
				} // if(is_array($ex_value))
			} // foreach($post_value)
		} // if (is_array($post_value))
	} // foreach ($data)
} //(is_array($post_data)

// function to normalize the name of the variable
function str_name($var_name = ''){  
$name = preg_replace('/[^0-9a-zA-Z_]/', "", $var_name);
	if (empty($name)){
		$name = 'string_'.rand(0,9999);
	}	
return $name;
}

/* from here you can call a php variable or an array as you have sent as post

json post example
{
	"MID": 44,
	"ST": 1,
	"UID": 6685059,
	"MV": "1.0",
	"FIFO": [{
		"Date": "2019/03/20 11:40:46",
		"Device": {
			"Bus": 1,
			"Value": 1
		}
	}]
}

*/

echo $MID;
echo $UID;
print_r($FIFO);
echo $Date;
print_r($Device);
echo $Bus;
echo $Value;
//  etc...

// hope to be useful... ;-)