How to reset array to continuous numeric index in php-PHP Tutorial-php.cn

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How to reset array to continuous numeric index in php

May 18, 2018 pm 01:45 PM

php array continuous

This time I will show you how to reset the array to a continuous digital index in PHP, and how to reset the array to a continuous digital index in PHP. What are the precautions?The following is a practical case. take a look.

For example, a php array like this:

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

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Want to convert to an array like this:

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

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1. Recommended methodarray_values Method

This method is applicable to both ordinary arrays and associative arrays

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

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Output result:

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

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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.

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

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Output result:

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

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3. Loop traversal

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

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

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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!