(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
array_fill — Fill an array with values
Parametersstart_index
The first index of the returned array.
If start_index is negative, the first index of the returned array will be start_index and the following indices will start from zero prior to PHP 8.0.0; as of PHP 8.0.0, negative keys are incremented normally (see example).
count
Number of elements to insert. Must be greater than or equal to zero, and less than or equal to 2147483647.
value
Value to use for filling
Returns the filled array
Errors/ExceptionsThrows a ValueError if count is out of range.
count is out of range; previously E_WARNING was raised, and the function returned false. Examples
Example #1 array_fill() example
<?php
$a = array_fill(5, 6, 'banana');
print_r($a);
?>
The above example will output:
Array
(
[5] => banana
[6] => banana
[7] => banana
[8] => banana
[9] => banana
[10] => banana
)
Example #2 array_fill() example with a negative start index
<?php
$a = array_fill(-2, 4, 'pear');
print_r($a);
?>
Output of the above example in PHP 8:
Array
(
[-2] => pear
[-1] => pear
[0] => pear
[1] => pear
)
Output of the above example in PHP 7:
Array
(
[-2] => pear
[0] => pear
[1] => pear
[2] => pear
)
Note that index -1 is not present prior to PHP 8.0.0.
See also the Arrays section of manual for a detailed explanation of negative keys.
csst0266 at cs dot uoi dot gr ¶20 years ago
This is what I recently did to quickly create a two dimensional array (10x10), initialized to 0:
<?php
$a = array_fill(0, 10, array_fill(0, 10, 0));
?>
This should work for as many dimensions as you want, each time passing to array_fill() (as the 3rd argument) another array_fill() function. anatoliy at ukhvanovy dot name ¶
10 years ago
If you need negative indices:
<?php
$b = array_fill(-2, 4, 'pear');$c = array_fill_keys(range(-2,1),'pear');print_r($b);
print_r($c);
?>
Here is result of the code above:
Array
(
[-2] => pear
[0] => pear
[1] => pear
[2] => pear
)
Array
(
[-2] => pear
[-1] => pear
[0] => pear
[1] => pear
)
11 years ago
Using objects with array_fill may cause unexpected results. Consider the following:
<?php
class Foo {
public $bar = "banana";
}$array = array_fill(0, 2, new Foo());var_dump($array);
$array[0]->bar = "apple";var_dump($array);
?>
Objects are filled in the array BY REFERENCE. They are not copied for each element in the array. miguelxpain at gmail dot com ¶
13 years ago
I made this function named "array_getMax" that returns te maximum value and index, from array:
<?php
function array_search_all($needle, $haystack)
{foreach ($haystack as $k=>$v) {
if(
$haystack[$k]==$needle){ $array[] = $k;
}
}
return ($array);
}
function
array_getMax($array){ $conteo=array_count_values($array);
if(
count($conteo)==1 ){return $array;
} arsort($array); $maxValue=null;
$keyValue=null;
foreach($array as $key=>$value){
if($maxValue==null){
$maxValue=$value;
$keyValue=$key;
break;
}
} $resultSearch=array_search_all($maxValue, $array);
return
array_fill_keys($resultSearch, $maxValue);
}
$arreglo=array('e1'=>99,'e2'=>'99','e3'=>1,'e4'=>1,'e5'=>98); var_dump(array_getMax($arreglo)); ?>
I hope some one find this usefull Hayley Watson ¶
7 years ago
Fill missing keys in a (numerically-indexed) array with a default value
<?phpfunction fill_missing_keys($array, $default = null, $atleast = 0)
{
return $array + array_fill(0, max($atleast, max(array_keys($array))), $default);
}?>
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