How to determine if an array has any elements or not?

Question

How do I find if an array has one or more elements?

I need to execute a block of code where the size of the array is greater than zero.

if ($result &         


        

Answer 1

Pro Tip:

If you are sure that:

1. the variable exists (isset) AND
2. the variable type is an array (is_array) ...might be true of all is_iterables, but I haven't researched that extension of the question scope.

Then you don't need to call any functions. An array with one or more elements has a boolean value of true. An array with no elements has a boolean value of false.

Code: (Demo)

var_export((bool)[]);
echo "\n";
var_export((bool)['not empty']);
echo "\n";
var_export((bool)[0]);
echo "\n";
var_export((bool)[null]);
echo "\n";
var_export((bool)[false]);
echo "\n";

$noElements = [];
if ($noElements) {
    echo 'not empty';
} else {
    echo 'empty';
}

Output:

false
true
true
true
true
empty