(PHP 5 >= 5.5.0, PHP 7, PHP 8)
Generator::key — Get the yielded key
This function has no parameters.
Returns the yielded key.
Example #1 Generator::key() example
<?phpfunction Gen(){ yield 'key' => 'value';}$gen = Gen();echo "{$gen->key()} => {$gen->current()}";
The above example will output:
key => value