HH\Shapes::keyExists
Check if a field in shape exists
public static function keyExists(
shape() $shape,
arraykey $index,
): bool;
Similar to array_key_exists, but for shapes.
Parameters
shape() $shapearraykey $index
Returns
bool
Examples
This example shows that keyExists returns true if a key exists in the Shape (even if the corresponding value is NULL):
function run(shape(?'x' => ?int, ?'y' => ?int, ?'z' => ?int) $point): void {
// The key 'x' exists in Shape $point
\var_dump(Shapes::keyExists($point, 'x'));
// The key 'z' doesn't exist in $point
\var_dump(Shapes::keyExists($point, 'z'));
// The key 'y' exists in $point, even though its value is NULL
\var_dump(Shapes::keyExists($point, 'y'));
}
<<__EntryPoint>>
function basic_usage_main(): void {
run(shape('x' => 3, 'y' => null));
}