how to change the array key to start from 1 instead of 0

Question

I have values in some array I want to re index the whole array such that the the first value key should be 1 instead of zero i.e.

By default in PHP the array key starts from 0. i.e. 0 => a, 1=> b, I want to reindex the whole array to start from key = 1 i.e 1=> a, 2=> b, ....

Answer 1

$alphabet = array("a", "b", "c"); array_unshift($alphabet, "phoney"); unset($alphabet[0]); 

Edit: I decided to benchmark this solution vs. others posed in this topic. Here's the very simple code I used:

$start = microtime(1); for ($a = 0; $a < 1000; ++$a) {     $alphabet = array("a", "b", "c");     array_unshift($alphabet, "phoney");     unset($alphabet[0]); } echo (microtime(1) - $start) . "\n";   $start = microtime(1); for ($a = 0; $a < 1000; ++$a) {     $stack = array('a', 'b', 'c');     $i= 1;     $stack2 = array();     foreach($stack as $value){         $stack2[$i] = $value;         $i++;     }     $stack = $stack2; } echo (microtime(1) - $start) . "\n";   $start = microtime(1); for ($a = 0; $a < 1000; ++$a) {     $array = array('a','b','c');      $array = array_combine(         array_map(function($a){             return $a + 1;         }, array_keys($array)),         array_values($array)     ); } echo (microtime(1) - $start) . "\n"; 

And the output:

0.0018711090087891 0.0021598339080811 0.0075368881225586 

Answer 2

Here is my suggestion:

<?php $alphabet = array(1 => 'a', 'b', 'c', 'd'); echo '<pre>'; print_r($alphabet); echo '</pre>'; ?> 

The above example will output:

Array (     [1] => a     [2] => b     [3] => c     [4] => d )