php教程

array_values

(PHP 4, PHP 5, PHP 7)

array_values返回数组中所有的值

说明

array_values ( array $array ) : array

array_values() 返回 input 数组中所有的值并给其建立数字索引。

参数

array

数组。

返回值

返回含所有值的索引数组。

范例

Example #1 array_values() 例子

<?php
$array 
= array("size" => "XL""color" => "gold");
print_r(array_values($array));
?>

以上例程会输出:

Array
(
    [0] => XL
    [1] => gold
)

参见

  • array_keys() - 返回数组中部分的或所有的键名
  • array_combine() - 创建一个数组,用一个数组的值作为其键名,另一个数组的值作为其值

User Contributed Notes

biziclop at vipmail dot hu 01-May-2014 11:47
Remember, array_values() will ignore your beautiful numeric indexes, it will renumber them according tho the 'foreach' ordering:

<?php
$a
= array(
 
3 => 11,
 
1 => 22,
 
2 => 33,
);
$a[0] = 44;

print_r( array_values( $a ));
==>
Array(
  [
0] => 11
 
[1] => 22
 
[2] => 33
 
[3] => 44
)
?>
heber dot gentilin at gmail dot com 21-Aug-2013 06:43
/**
* Return the new array from the offset index
*/
function array_values_from($array, $offset_index = 0) {
    if (!is_array($array))
        return null;
    $index = (int)$offset_index;
    foreach($array as $i => $value)
        $array_return[$index++] = $value;
    return $array_return;
}
Certainist 22-Apr-2013 03:51
Non-recursive simplest array_flatten.

<?php

function array_flatten($arr) {
   
$arr = array_values($arr);
    while (list(
$k,$v)=each($arr)) {
        if (
is_array($v)) {
           
array_splice($arr,$k,1,$v);
           
next($arr);
        }
    }
    return
$arr;
}

?>
info at djdb dot be 29-Jan-2013 12:45
<?php
$array
= array("size" => "XL", "color" => "gold","x" => " ","y" => "gold","z" => "");
print_r(array_values($array));
?>
wil result:
Array ( [0] => XL [1] => gold [2] => [3] => gold [4] => )
kapilgopinath at gmail dot com 09-Mar-2012 06:57
extract all values from a multi dimesnsional array or a nexted json object
function array_keys_multi($array,&$vals)
{
    foreach ($array as $key => $value) {

        if (is_array($value)) {
               
            array_keys_multi($value,$vals);
       
        }else{
           
            $vals[] = $value;
        }
    }
 
    return $vals;
}
a dot ross at amdev dot eu 30-May-2011 12:21
<?php
/**
 * Flattens an array, or returns FALSE on fail.
 */
function array_flatten($array) {
  if (!
is_array($array)) {
    return
FALSE;
  }
 
$result = array();
  foreach (
$array as $key => $value) {
    if (
is_array($value)) {
     
$result = array_merge($result, array_flatten($value));
    }
    else {
     
$result[$key] = $value;
    }
  }
  return
$result;
}
?>
abimaelrc 10-May-2011 05:39
This is another way to get value from a multidimensional array, but for versions of php >= 5.3.x
<?php
/**
 * Get all values from specific key in a multidimensional array
 *
 * @param $key string
 * @param $arr array
 * @return null|string|array
 */
function array_value_recursive($key, array $arr){
   
$val = array();
   
array_walk_recursive($arr, function($v, $k) use($key, &$val){
        if(
$k == $key) array_push($val, $v);
    });
    return
count($val) > 1 ? $val : array_pop($val);
}

$arr = array(
   
'foo' => 'foo',
   
'bar' => array(
       
'baz' => 'baz',
       
'candy' => 'candy',
       
'vegetable' => array(
           
'carrot' => 'carrot',
        )
    ),
   
'vegetable' => array(
       
'carrot' => 'carrot2',
    ),
   
'fruits' => 'fruits',
);

var_dump(array_value_recursive('carrot', $arr)); // array(2) { [0]=> string(6) "carrot" [1]=> string(7) "carrot2" }
var_dump(array_value_recursive('apple', $arr)); // null
var_dump(array_value_recursive('baz', $arr)); // string(3) "baz"
var_dump(array_value_recursive('candy', $arr)); // string(5) "candy"
var_dump(array_value_recursive('pear', $arr)); // null
?>
aowie1 at gmail dot com 19-Jan-2011 12:23
I needed a function that recursively went into each level of the array to order (only the indexed) arrays... and NOT flatten the whole thing.

Solution:
<?php
function array_values_recursive($arr){
       
$arr = array_values($arr);
        foreach(
$arr as $key => $val)
            if(
array_values($val) === $val)
               
$arr[$key] = array_values_recursive($val);
       
        return
$arr;
}
?>
geo dot artemenko at gmail dot com 04-May-2010 12:37
same array_flatten function, compressed and preserving keys.

function array_flatten($a,$f=array()){
  if(!$a||!is_array($a))return '';
  foreach($a as $k=>$v){
    if(is_array($v))$f=array_flatten($v,$f);
    else $f[$k]=$v;
  }
  return $f;
}
Carsten Milkau 01-Nov-2009 04:46
Note that in a multidimensional array, each element may be identified by a _sequence_ of keys, i.e. the keys that lead towards that element. Thus "preserving keys" may have different interpretations. Ivan's function for example creates a two-dimensional array preserving the last two keys. Other functions below create a one-dimensional array preserving the last key. For completeness, I will add a function that merges the key sequence by a given separator and a function that preserves the last n keys, where n is arbitrary.

<?php
/*
 * Flattening a multi-dimensional array into a
 * single-dimensional one. The resulting keys are a
 * string-separated list of the original keys:
 *
 * a[x][y][z] becomes a[implode(sep, array(x,y,z))]
 */

function array_flatten_sep($sep, $array) {
 
$result = array();
 
$stack = array();
 
array_push($stack, array("", $array));

  while (
count($stack) > 0) {
    list(
$prefix, $array) = array_pop($stack);

    foreach (
$array as $key => $value) {
     
$new_key = $prefix . strval($key);

      if (
is_array($value))
       
array_push($stack, array($new_key . $sep, $value));
      else
       
$result[$new_key] = $value
   
}
  }

  return
$result;
}

/*
 * Flattening a multi-dimensional array into an
 * n-dimensional one. The last n keys of each element are
 * preserved. If this results in ambiguities, results are
 * undefined.
 *
 * a[x_1][x_2]...[x_m]  becomes  a[x_{m-n+1}]...[x_m]
 */
function array_flatten_n($array, $n) {
 
$result = array();
 
$stack = array();
 
array_push($stack, array(array(), $array));

  while (
count($stack) > 0) {
    list(
$prefix, $array) = array_pop($stack);

    foreach (
$array as $key => $value) {
      if (
is_array($value)) {
       
$new_prefix = array_values($prefix);
       
array_push($new_prefix, $key);
        if (
count($new_prefix) >= n)
         
array_shift($new_prefix);

       
array_push($stack, array($new_prefix, $value));
      } else {
       
$array = $result;
        foreach (
$prefix as $pkey) {
           if (!
is_array($array[$pkey]))
            
$array[$pkey] = array();
          
$array = $array[$pkey];
        }
       
$array[$key] = $value;
      }
    }
  }

  return
$result;
}
?>
karl dot rixon at gmail dot com 18-Sep-2009 02:57
A modification of wellandpower at hotmail.com's function to perform array_values recursively. This version will only re-index numeric keys, leaving associative array indexes alone.

<?php

function array_values_recursive($array) {
   
$temp = array();
    foreach (
$array as $key => $value) {
        if (
is_numeric($key)) {
           
$temp[] = is_array($value) ? array_values_recursive($value) : $value;
        } else {
           
$temp[$key] = is_array($value) ? array_values_recursive($value) : $value;
        }
    }
    return
$temp;
}

?>
chrysb at gmail dot com 24-Sep-2008 12:34
If you are looking for a way to count the total number of times a specific value appears in array, use this function:

<?php
function array_value_count ($match, $array)
{
   
$count = 0;
   
    foreach (
$array as $key => $value)
    {
        if (
$value == $match)
        {
           
$count++;
        }
    }
   
    return
$count;
}
?>

This should really be a native function of PHP.
madhamster 12-Jun-2008 04:18
Good function, if you want to acces associative array element by position:

<?php

$array
= array('fruit'=>'apple', 'juice'=>'orange', 'color'=>'lime');

$array = array_values($array);

echo
$array[2];

?>
rene dot zak at post dot cz 24-Apr-2008 01:05
<?php
$array
= array(
   
'fruit1' => 'apple',
   
'fruit2' => 'orange',
   
'fruit3' => ' ',
   
'fruit4' => ' ',
   
'fruit5' => 'apple');

    for (
$i = 0; $i count($array); $i++) {
   
$key=key($array);
   
$val=$array[$key];
    if (
$val<> ' ') {
       echo
$key ." = "$val ." <br> ";
       }
    
next($array);
    }

/*
fruit1 = apple
fruit2 = orange
fruit5 = apple
*/
?>
bluej100 at gmail dot com 07-Sep-2007 10:10
Most of the array_flatten functions don't allow preservation of keys. Mine allows preserve, don't preserve, and preserve only strings (default).

<?
// recursively reduces deep arrays to single-dimensional arrays
// $preserve_keys: (0=>never, 1=>strings, 2=>always)
function array_flatten($array, $preserve_keys = 1, &$newArray = Array()) {
  foreach ($array as $key => $child) {
    if (is_array($child)) {
      $newArray =& array_flatten($child, $preserve_keys, $newArray);
    } elseif ($preserve_keys + is_string($key) > 1) {
      $newArray[$key] = $child;
    } else {
      $newArray[] = $child;
    }
  }
  return $newArray;
}

// Tests

$array = Array(
  'A' => Array(
    1 => 'foo',
    2 => Array(
      'a' => 'bar'
    )
  ),
  'B' => 'baz'
);

echo 'var_dump($array);'."\n";
var_dump($array);
echo 'var_dump(array_flatten($array, 0));'."\n";
var_dump(array_flatten($array, 0));
echo 'var_dump(array_flatten($array, 1));'."\n";
var_dump(array_flatten($array, 1));
echo 'var_dump(array_flatten($array, 2));'."\n";
var_dump(array_flatten($array, 2));
?>
deceze at gmail dot YesThatsGoogleMail dot com 03-Sep-2007 12:31
Please note that 'wellandpower at hotmail.com's recursive merge doesn't work. Here's the fixed version:

<?php

function array_values_recursive($array) {
  
$flat = array();

   foreach (
$array as $value) {
           if (
is_array($value)) $flat = array_merge($flat, array_values_recursive($value));
           else
$flat[] = $value;
   }
   return
$flat;
}

?>
warmo_at_o2_dot_pl 21-Mar-2007 10:42
@Yassin Ezbakhe <yassin88 at gmail dot com>
When we have to flatten multidimensional array of strings or numbers this method could be much faster.
Inconvenience of this method is, that its speed depends on size of strings/numbers, which array contains - bigger strings, lower efficiency.
Conclusion: Use this method for small amount of data in arrays (less than 500B per element in my case) which have many dimensions, in other case, use Yassin Ezbakhe method.

<?php

function md_implode($array, $glue = '')
{
    if (
is_array ($array))
    {
       
$output = '';
        foreach (
$array as $v)
        {
           
$output .= md_implode($v, $glue);
        }
        return
$output;
    }
    else
    {
        return
$array.$glue;
    }
}

function
md_array_flatten($md_array)
{
   
$flat_array = explode ('#|#',md_implode($md_array,'#|#')); // "#|#" is a sample delimiter
   
array_pop($flat_array); // to remove last empty element
   
return $flat_array;
}

//Usage:
$flat_array = md_array_flatten($some_md_array)

?>
ahigerd at stratitec dot com 24-Jan-2007 06:07
A comment on array_merge mentioned that array_splice is faster than array_merge for inserting values. This may be the case, but if your goal is instead to reindex a numeric array, array_values() is the function of choice. Performing the following functions in a 100,000-iteration loop gave me the following times: ($b is a 3-element array)

array_splice($b, count($b)) => 0.410652
$b = array_splice($b, 0) => 0.272513
array_splice($b, 3) => 0.26529
$b = array_merge($b) => 0.233582
$b = array_values($b) => 0.151298
wellandpower at hotmail.com 29-Aug-2006 05:56
The function here flatterns an entire array and was not the behaviour I expected from a function of this name.

I expected the function to flattern every sub array so that all the values were aligned and it would return an array with the same dimensions as the imput array, but as per array_values() adjusting the keys rater than removing them.

In order to do this, you will want this function:

function array_values_recursive($array) {
   $temp = array();

   foreach ($array as $value) {
           if(is_array($value)) { $temp[] = array_values_recursive($value); }
           else { $temp[] = $value; }
   }
   return $temp;
}

Hopefully this will assist.
wizglins at gmx dot ch 13-Apr-2006 12:21
In case you want to replace all keys in multiarrays by integers starting at 0, the following function might help.

<?php

function numerieren($array)
{
$array_v = array_values($array);
$count_v = count($array_v);

for (
$i=0; $i<$count_v; $i++)
  if (
is_array($array_v[$i]))
   
$array_v[$i] = numerieren($array_v[$i]);
return
$array_v;
}

?>
Yassin Ezbakhe <yassin88 at gmail dot com> 31-Aug-2005 04:28
<?php
/**********************************************
 *
 *   PURPOSE: Flatten a deep multidimensional array into a list of its
 *   scalar values
 *
 *   array array_values_recursive (array array)
 *
 *   WARNING: Array keys will be lost
 *
 *********************************************/

function array_values_recursive($array)
{
   
$arrayValues = array();

    foreach (
$array as $value)
    {
        if (
is_scalar($value) OR is_resource($value))
        {
            
$arrayValues[] = $value;
        }
        elseif (
is_array($value))
        {
            
$arrayValues = array_merge($arrayValues, array_values_recursive($value));
        }
    }

    return
$arrayValues;
}
?>

This function is an improved and faster version of the one posted by <27-Apr-2004 09:47>
27-Apr-2004 06:47
<?php
/**
   flatten an arbitrarily deep multidimensional array
   into a list of its scalar values
   (may be inefficient for large structures)
   (will infinite recurse on self-referential structures)
   (could be extended to handle objects)
*/
function array_values_recursive($ary)
{
  
$lst = array();
   foreach(
array_keys($ary) as $k ){
     
$v = $ary[$k];
      if (
is_scalar($v)) {
        
$lst[] = $v;
      } elseif (
is_array($v)) {
        
$lst = array_merge( $lst,
           
array_values_recursive($v)
         );
      }
   }
   return
$lst;
}
?>

code till dawn!  -mark meves!
nopy at users dot sourceforge dot net 24-Oct-2003 03:36
Just a warning that re-indexing an array by array_values() may cause you to reach the memory limit unexpectly.

For example, if your PHP momory_limits is 8MB,
 and says there's a BIG array $bigArray which allocate 5MB of memory.

Doing this will cause PHP exceeds the momory limits:

<?php
  $bigArray
= array_values( $bigArray );
?>

It's because array_values() does not re-index $bigArray directly,
it just re-index it into another array, and assign to itself later.
mailseppel at gmx dot de 04-Oct-2002 04:10
Remember, that the following way of fetching data from a mySql-Table will do exactly the thing as carl described before: An array, which data may be accessed both by numerical and DB-ID-based Indexes:

<?php
$row
= mysql_fetch_array($db_result, $db_link);
?>

Hope I haven't misunderstood anything here.. :)
carl at thep.lu.se 29-Jan-2002 03:59
Indeed you can, and that's what's so great about it. I have, for instance, a function that returns the results of a database query as an array. I want to keep the order that the entries were returned in, but at the same time I want to be able to access them _either_ by the position _or_ by some other index (such as some sort of ID in the database, gotten from elsewhere). In this case, I can make the function return an array from id to [array of values], and by a simple call to array_values() this is transformed into an array indexed from 0 to count()-1. Useful.

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