Obtenga la primera clave de la matriz PHP
$firstKey = array_key_first($array);
butterfly
$firstKey = array_key_first($array);$colors = array(2=>"blue",3 =>"green",1=>"red");
$firstValue = reset($colors); //blue
$firstKey = key($colors); //2<?php
$stack = array("orange", "banana", "apple", "raspberry");
$fruit = array_shift($stack); //Remove "orange" from array and return it
print_r($stack);
/** OUTPUT:
Array
(
[0] => banana
[1] => apple
[2] => raspberry
)
*/
?>array_shift(array_values($array));
$firstKey=array_keys($arr)[0];array_pop(array_reverse($array));