Several PHP reset arrays to consecutive numeric indexes

This article mainly shares with you a summary of several ways to reset an array to a continuous numeric index in PHP. It has a good reference value and I hope it can help everyone.

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. The recommended method is the array_values ​​method

This method is suitable for ordinary arrays and Applicable to associative arrays

 'jerry', 
  'age' => 16, 
  'height' => '18cm' 
); 
 
print_r(array_values($arr1));

Output results:

[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

This method if only one array is given and the array is numerically indexed, the key names will be re-indexed in a continuous manner. So it only works with numeric indexes.

 '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 primitive method is bloated and inelegant, so I strongly resist it.

 'jerry', 
  'age' => 16, 
  'height' => '18cm' 
); 
 
print_r(resetArr($arr1));

Related recommendations:

php numeric index array instance usage summary

How to retain numeric index in php array

How to convert the key index of the array into a numeric index

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