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

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

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<?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.