How to reset array to numerical index-PHP Tutorial-php.cn

How to reset array to numerical index

php中世界最好的语言

Release： 2023-03-22 09:08:01

Original

1882 people have browsed it

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' 
);

Copy after login

Want to convert to an array like this:

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

Copy after login

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));

Copy after login

Output result:

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

Copy after login

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));

Copy after login

Output result:

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

Copy after login

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));

Copy after login

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!