DocumentationHackReferenceClassHH\Setcontains

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'));