HH\Set::contains

Determines if the specified value is in the current Set

public function contains(
  arraykey $val,
): bool;

Parameters

  • arraykey $val

Returns

  • bool - true if the specified value is present in the current Set; false otherwise.

Examples

$s = Set {'red', 'green', 'blue', 'yellow'};

// Prints "true", since $s contains "red"
var_dump($s->contains('red'));

// Prints "false", since $s doesn't contain "blurple"
var_dump($s->contains('blurple'));
Output
bool(true)
bool(false)