Php заполнить все пустые значения массива

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PHP | Arrays
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PHP array_fill() function
PHP array_fill_keys() Function
PHP Array Functions Complete Reference

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PHP Date and Time
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SplDoublyLinkedList in PHP
PHP SplDoublyLinkedList add() Function
PHP SplDoublyLinkedList bottom() Function
PHP SplDoublyLinkedList count() function
PHP SplFixedArray count() Function
PHP SplFixedArray current() Function
PHP SplFixedArray getSize() Function
PHP SplFixedArray key() Function
PHP SplObjectStorage addAll() Function
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PHP SplQueue::__construct() Function
PHP SPL Data structures Complete Reference

Источник

array_fill_keys

Fills an array with the value of the value parameter, using the values of the keys array as keys.

Parameters

Array of values that will be used as keys. Illegal values for key will be converted to string .

Return Values

Examples

Example #1 array_fill_keys() example

$keys = array( ‘foo’ , 5 , 10 , ‘bar’ );
$a = array_fill_keys ( $keys , ‘banana’ );
print_r ( $a );
?>

The above example will output:

Array ( [foo] => banana [5] => banana [10] => banana [bar] => banana )

User Contributed Notes 10 notes

var_dump ( array_fill_keys ( $a , «test» ));
?>

array(1) <
[1]=>
string(4) «test»
>

now string key «1» become an integer value 1, be careful.

If an associative array is used as the second parameter of array_fill_keys, then the associative array will be appended in all the values of the first array.
e.g.
$array1 = array(
«a» => «first» ,
«b» => «second» ,
«c» => «something» ,
«red»
);

$array2 = array(
«a» => «first» ,
«b» => «something» ,
«letsc»
);

print_r ( array_fill_keys ( $array1 , $array2 ));
?>

The output will be
Array(
[first] => Array(
[a] => first,
[b] => something,
[0] => letsc
),
[second] => Array(
[a] => first,
[b] => something,
[0] => letsc
),
[something] => Array(
[a] => first,
[b] => something,
[0] => letsc
),
[red] => Array(
[a] => first,
[b] => something,
[0] => letsc
)
)

Get an associative array of zeros for counting letter frequency

$ltrs = array_fill_keys ( range ( ‘a’ , ‘z’ ), 0 );

RE: bananasims at hotmail dot com

I also needed a work around to not having a new version of PHP and wanting my own keys. bananasims code doesn’t like having an array as the second parameter.

Here’s a slightly modified version than can handle 2 arrays as inputs:

//we want these values to be keys
$arr1 = (0 => «abc», 1 => «def»);
/we want these values to be values
$arr2 = (0 => 452, 1 => 128);

function array_fill_keys($keyArray, $valueArray) if(is_array($keyArray)) foreach($keyArray as $key => $value) $filledArray[$value] = $valueArray[$key];
>
>
return $filledArray;
>

see array_fill_keys are basically used to make a new array from a pre-existing array in a form that the value of the pre-existing array will now be the key of the new Array .And there value will be same That we had given in the 2nd parameter . Example Below—->>>

//pre existing array
$a = array( «a» , «b» , «c» , «d» , «e» );

//new array with a single same value

$newArray = array_fill_keys ( $a , «Testing» );

echo «

" ; 
print_r ( $newArray ); 
echo "

» ;
?>
output;
Array
(
[a] => Testing
[b] => Testing
[c] => Testing
[d] => Testing
[e] => Testing
)

Some of the versions do not have this function.
I try to write it myself.
You may refer to my script below

function array_fill_keys($array, $values) if(is_array($array)) foreach($array as $key => $value) $arraydisplay[$array[$key]] = $values;
>
>
return $arraydisplay;
>

This function does the same as:
$array = array_combine ( $keys , array_fill ( 0 , count ( $keys ), $value ));
?>

Scratchy’s version still doesn’t work like the definition describes. Here’s one that can take a mixed variable as the second parameter, defaulting to an empty string if it’s not specified. Don’t know if this is exactly how the function works in later versions but it’s at least a lot closer.

function array_fill_keys($target, $value = ») if(is_array($target)) foreach($target as $key => $val) $filledArray[$val] = is_array($value) ? $value[$key] : $value;
>
>
return $filledArray;
>

This works for either strings or numerics, so if we have

$arr1 = array(0 => ‘abc’, 1 => ‘def’);
$arr2 = array(0 => 452, 1 => 128);
$arr3 = array(0 => ‘foo’, 1 => ‘bar’);

array_fill_keys($arr1,$arr2)
returns: [abc] => 452, [def] => 128

array_fill_keys($arr1,0)
returns: [abc] => 0, [def] => 0

array_fill_keys($arr2,$arr3)
returns: [452] => foo, [128] => bar

array_fill_keys($arr3,’BLAH’)
returns: [foo] => BLAH, [bar] => BLAH

and array_fill_keys($arr1)
returns: [abc] =>, [def] =>

Источник

Php заполнить все пустые значения массива