PHP uses the key value of the post array to create a variable with the same name and assign a value method _php tips

This example describes a method that PHP uses the key value of the post array to create and assign a variable with the same name. Share to everyone for your reference. Specifically as follows:

This code can automatically create a variable of the same name based on the key value of the post array, which is convenient to use without declaring the variable in advance

<?php
$expected =array (' username ', ' age ', ' City ', ' Street ');
foreach ($expected as $key) {
  if (!empty ($_post[$key))) {
    ${key}=$_post[$key];
  }
  else{
    ${key}=null
  }
? >

I hope this article will help you with your PHP program design.