Question

How to extract keys in the array into new variables with prefix when some of the variables exist in PHP

Answer 1

$profession = "Engineer";
$arr = array('name' => "Avi", 'age' => 48, 'profession' => "Programmer");

//EXTR_PREFIX_SAME
//If there is a collision, prefix the variable name with prefix.
extract($arr, EXTR_PREFIX_SAME, "employee");
echo "$name, $age, $profession, $employee_profession <br />"; // Avi, 48, Engineer, Programmer
echo "$name <br />"; // Avi
echo "$age <br />"; // 48
echo "$profession <br />"; // Engineer
echo "$employee_profession <br />"; // Programmer




/*
run: 

Avi, 48, Engineer, Programmer 
Avi 
48 
Engineer 
Programmer 

*/

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Answer 2

$profession = "Engineer";
unset($profession);
// When the variable $profession not exist we didn't need the EXTR_PREFIX_SAME
$arr = array('name' => "Avi", 'age' => 48, 'profession' => "Programmer");
extract($arr, EXTR_PREFIX_SAME, "employee");
echo "$name, $age, $profession, $employee_profession <br />"; 
echo "$name <br />"; 
echo "$age <br />"; 
echo "$profession <br />"; 
echo "$employee_profession <br />"; 


/*
run: 


Notice: Undefined variable: employee_profession in C:\xampp\htdocs\knowrex.com\test.php on line 14
Avi, 48, Programmer, 
Avi 
48 
Programmer 

Notice: Undefined variable: employee_profession in C:\xampp\htdocs\knowrex.com\test.php on line 18

*/

 

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