How to reset array to numerical index

This time I will show you how to reset the array to a numeric index, and what are the precautions for resetting the array to a numeric index. The following is a practical case, let's take a look.

For example, a php array like this:

$arr = array( 
  1 => 'apple', 
  3 => 'banana', 
  5 => 'orange' 
);

Want to convert to an array like this:

$arr = array( 
  0 => 'apple', 
  1 => 'banana', 
  2 => 'orange' 
);

1. Recommended methodarray_values Method

This method is applicable to both ordinary arrays and associative arrays

<?php 
 
$arr = array( 
  1 => 'apple', 
  3 => 'banana', 
  5 => 'orange' 
); 
 
print_r(array_values($arr)); 
 
$arr1 = array( 
  'name' => 'jerry', 
  'age' => 16, 
  'height' => '18cm' 
); 
 
print_r(array_values($arr1));

Output result:

[root@localhost php]# php array.php  
Array 
( 
  [0] => apple 
  [1] => banana 
  [2] => orange 
) 
Array 
( 
  [0] => jerry 
  [1] => 16 
  [2] => 18cm 
)

2. Use the array_merge method

If only one array is given and The array is numerically indexed, so the keys are re-indexed consecutively. So it only works with numeric indexes.

<?php 
 
$arr = array( 
  1 => 'apple', 
  3 => 'banana', 
  5 => 'orange' 
); 
 
print_r(array_merge($arr)); 
 
$arr1 = array( 
  'name' => 'jerry', 
  'age' => 16, 
  'height' => '18cm' 
); 
 
print_r(array_merge($arr1));

Output result:

[root@localhost php]# php array.php  
Array 
( 
  [0] => apple 
  [1] => banana 
  [2] => orange 
) 
Array 
( 
  [name] => jerry 
  [age] => 16 
  [height] => 18cm 
)

3. Loop traversal

The most original way, bloated and not elegant enough, trying to resist.

<?php 
 
function resetArr($arr){ 
  $temp = array(); 
  foreach($arr as $v){ 
    $temp[] = $v; 
  } 
  return $temp; 
} 
 
$arr = array( 
  1 => 'apple', 
  3 => 'banana', 
  5 => 'orange' 
); 
 
print_r(resetArr($arr)); 
 
$arr1 = array( 
  'name' => 'jerry', 
  'age' => 16, 
  'height' => '18cm' 
); 
 
print_r(resetArr($arr1));

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

How to generate random numbers in PHP

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The above is the detailed content of How to reset array to numerical index. For more information, please follow other related articles on the PHP Chinese website!