How to define array constants (array constants) in PHP, array constant_PHP tutorial

How to define array constants (array constants) in PHP, array constants

In PHP, we cannot use const to directly define array constants, but const can define string constants, and combined with the eval() function, the string constants can be executed. Therefore, we can return an array constant by defining a string constant. Here is the moment for us to witness the miracle!

Copy code The code is as follows:

class Test
{
const MY_ARR="return array("a","b","c","d");";
public function getConstArray()
{
Return eval(Test::MY_ARR);//The eval() function executes the string as PHP code
}
}
$t=new Test();
print_r($t->getConstArray());
?>

In the above code, the getConstArray() function is equivalent to an array constant.

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