(PECL ds >= 1.0.0)
Ds\Vector::first — Returns the first value in the vector
public Ds\Vector::first ( ) : mixed
Returns the first value in the vector.
This function has no parameters.
The first value in the vector.
UnderflowException if empty.
Example #1 Ds\Vector::first() example
<?php $vector = new \Ds\Vector([1, 2, 3]); var_dump($vector->first()); ?>
The above example will output something similar to:
int(1)
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https://www.php.net/manual/en/ds-vector.first.php