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Сумма всех чисел массива php

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Содержание
  1. array_sum
  2. Parameters
  3. Return Values
  4. Examples
  5. Смотрите также
  6. array_sum
  7. Список параметров
  8. Возвращаемые значения
  9. Примеры
  10. User Contributed Notes 6 notes
  11. PHP array_sum() Function
  12. Definition and Usage
  13. Syntax
  14. Parameter Values
  15. Technical Details
  16. More Examples
  17. Example
  18. COLOR PICKER
  19. Report Error
  20. Thank You For Helping Us!

array_sum

array_sum () возвращает сумму значений в массиве.

Parameters

Return Values

Возвращает сумму значений в виде целого числа или числа с плавающей запятой; 0 , если array пуст.

Examples

Пример # 1 array_sum () примеры 

 $a = array(2, 4, 6, 8); echo "sum(a) = " . array_sum($a) . "\n"; $b = array("a" => 1.2, "b" => 2.3, "c" => 3.4); echo "sum(b) = " . array_sum($b) . "\n"; ?>

Выводится приведенный выше пример:

PHP 8.2

(PHP 4,5,7,8)array_slice Извлечение array_slice()возвращает последовательность элементов из указанных параметрами offset и length.

(PHP 4,5,7,8)array_splice Удаляет часть массива и заменяет ее чем-то другим Удаляет из массива элементы,обозначенные смещением и длиной

(PHP 5,7,8)array_udiff Вычисляет разность массивов,используя функцию обратного вызова для сравнения данных Первый массив.

(PHP 5,7,8)array_udiff_assoc Вычисляет разность массивов с дополнительной проверкой индексов,сравнивает данные с помощью функции обратного вызова Примечание:Пожалуйста,обратите внимание,что это

Источник

Смотрите также

A simple trick that can help you to guess what diff/intersect or sort function does by name.

[suffix] assoc — additional index check. Compares both value and index.

Example: array_diff_assoc, array_intersect_assoc.

[suffix] key — index only check. Ignores value of array, compares only indexes.

Example: array_diff_key, array_intersect_key.

[suffix] **empty** — no «key» or «assoc» word in suffix. Compares values only. Ignores indexes of array.

Example: array_diff, array_intersect.

[prefix] u — will do comparison with user defined function. Letter u can be used twice in some functions (like array_udiff_uassoc), this means that you have to use 2 functions (one for value, one for index).

Example: array_udiff_uassoc, array_uintersect_assoc.

This also works with array sort functions:

[prefix] a — associative. Will preserve keys. [prefix] k — key sort. Will sort array by keys. [prefix] r — reverse. Will sort array in reverse order. [prefix] u — sort by user defined function (same as for diff/intersect).

Big arrays use a lot of memory possibly resulting in memory limit errors. You can reduce memory usage on your script by destroying them as soon as you´re done with them. I was able to get over a few megabytes of memory by simply destroying some variables I didn´t use anymore.
You can view the memory usage/gain by using the funcion memory_get_usage(). Hope this helps!

I need to take an element from the Array and change its position within the Array by moving the rest of the elements as required.
This is the function that does it. The first parameter is the working Array. The second is the position of the element to move and the third is the position where to move the element.
The function returns the modified Array.
function array_move_elem ( $array , $from , $to ) if ( $from == $to ) < return $array ; >
$c = count ( $array );
if (( $c > $from ) and ( $c > $to )) if ( $from < $to ) $f = $array [ $from ];
for ( $i = $from ; $i < $to ; $i ++) $array [ $i ] = $array [ $i + 1 ];
>
$array [ $to ] = $f ;
> else $f = $array [ $from ];
for ( $i = $from ; $i > $to ; $i —) $array [ $i ] = $array [ $i — 1 ];
>
$array [ $to ] = $f ;
>

?>
Examples:
$array = array( ‘Cero’ , ‘Uno’ , ‘Dos’ , ‘Tres’ , ‘Cuatro’ , ‘Cinco’ , ‘Seis’ , ‘Siete’ , ‘Ocho’ , ‘Nueve’ , ‘Diez’ );
$array = array_move_elem ( $array , 3 , 5 ); // Move element in position 3 to position 5.
print_r ( $array );

$array = array_move_elem ( $array , 5 , 3 ); // Move element in position 5 to position 3, leaving array as it was. 😉
print_r ( $array );

?>
Return:
Array ( [ 0 ] => Cero [ 1 ] => Uno [ 2 ] => Dos [ 3 ] => Cuatro [ 4 ] => Cinco [ 5 ] => Tres [ 6 ] => Seis [ 7 ] => Siete [ 8 ] => Ocho [ 9 ] => Nueve [ 10 ] => Diez )
Array ( [ 0 ] => Cero [ 1 ] => Uno [ 2 ] => Dos [ 3 ] => Tres [ 4 ] => Cuatro [ 5 ] => Cinco [ 6 ] => Seis [ 7 ] => Siete [ 8 ] => Ocho [ 9 ] => Nueve [ 10 ] => Diez )
?>

Updated code of ‘indioeuropeo’ with option to input string-based keys.

FUNCTION:
function array_move_elem ( $array , $from , $to ) // return if non-numeric couldn’t be found or from=to
if(! is_numeric ( $from )) if( array_search ( $from , array_keys ( $array ))!== FALSE ) $from = array_search ( $from , array_keys ( $array ));
>else return $array ;
>
>
$array_numeric_keys = array();
foreach( $array as $k => $v ) $array_numeric_keys [] = $k ;
>
if ( $from == $to ) < return $array ; >
$c = count ( $array_numeric_keys );
if (( $c > $from ) and ( $c > $to )) if ( $from < $to ) $f = $array_numeric_keys [ $from ];
for ( $i = $from ; $i < $to ; $i ++) $array_numeric_keys [ $i ] = $array_numeric_keys [ $i + 1 ];
>
$array_numeric_keys [ $to ] = $f ;
> else $f = $array_numeric_keys [ $from ];
for ( $i = $from ; $i > $to ; $i —) $array_numeric_keys [ $i ] = $array_numeric_keys [ $i — 1 ];
>
$array_numeric_keys [ $to ] = $f ;
>

>
$array_new = array();
foreach( $array_numeric_keys as $v ) $array_new [ $v ] = $array [ $v ];
>
return $array_new ;
>
?>

Here is a function to find out the maximum depth of a multidimensional array.

// return depth of given array
// if Array is a string ArrayDepth() will return 0
// usage: int ArrayDepth(array Array)

function ArrayDepth ( $Array , $DepthCount =- 1 , $DepthArray =array()) $DepthCount ++;
if ( is_array ( $Array ))
foreach ( $Array as $Key => $Value )
$DepthArray []= ArrayDepth ( $Value , $DepthCount );
else
return $DepthCount ;
foreach( $DepthArray as $Value )
$Depth = $Value > $Depth ? $Value : $Depth ;
return $Depth ;
>
?>

While PHP has well over three-score array functions, array_rotate is strangely missing as of PHP 5.3. Searching online offered several solutions, but the ones I found have defects such as inefficiently looping through the array or ignoring keys.

The following array_rotate() function uses array_merge and array_shift to reliably rotate an array forwards or backwards, preserving keys. If you know you can trust your $array to be an array and $shift to be between 0 and the length of your array, you can skip the function definition and use just the return expression in your code.

function array_rotate ( $array , $shift ) if(! is_array ( $array ) || ! is_numeric ( $shift )) if(! is_array ( $array )) error_log ( __FUNCTION__ . ‘ expects first argument to be array; ‘ . gettype ( $array ). ‘ received.’ );
if(! is_numeric ( $shift )) error_log ( __FUNCTION__ . ‘ expects second argument to be numeric; ‘ . gettype ( $shift ). » ` $shift ` received.» );
return $array ;
>
$shift %= count ( $array ); //we won’t try to shift more than one array length
if( $shift < 0 ) $shift += count ( $array ); //handle negative shifts as positive
return array_merge ( array_slice ( $array , $shift , NULL , true ), array_slice ( $array , 0 , $shift , true ));
>
?>
A few simple tests:
$array =array( «foo» => 1 , «bar» => 2 , «baz» => 3 , 4 , 5 );

print_r ( array_rotate ( $array , 2 ));
print_r ( array_rotate ( $array , — 2 ));
print_r ( array_rotate ( $array , count ( $array )));
print_r ( array_rotate ( $array , «4» ));
print_r ( array_rotate ( $array , — 9 ));
?>

Short function for making a recursive array copy while cloning objects on the way.

function arrayCopy ( array $array ) $result = array();
foreach( $array as $key => $val ) if( is_array ( $val ) ) $result [ $key ] = arrayCopy ( $val );
> elseif ( is_object ( $val ) ) $result [ $key ] = clone $val ;
> else $result [ $key ] = $val ;
>
>
return $result ;
>
?>

/*to change an index without rewriting the whole table and leave at the same place.
*/
function change_index (& $tableau , $old_key , $new_key ) $changed = FALSE ;
$temp = 0 ;
foreach ( $tableau as $key => $value ) switch ( $changed ) case FALSE :
//creates the new key and deletes the old
if ( $key == $old_key ) $tableau [ $new_key ] = $tableau [ $old_key ];
unset( $tableau [ $old_key ]);
$changed = TRUE ;
>
break;

case TRUE :
//moves following keys
if ( $key != $new_key ) $temp = $tableau [ $key ];
unset( $tableau [ $key ]);
$tableau [ $key ] = $temp ;
break;
>
else < $changed = FALSE ;>//stop
>
>
array_values ( $tableau ); //free_memory
>

//Result :
$tableau = array( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 );
$res = print_r ( $tableau , TRUE );
$longueur = strlen ( $res ) — 1 ;
echo «Old array :\n» . substr ( $res , 8 , $longueur ) . «\n» ;

change_index ( $tableau , 2 , ‘number 2’ );
$res = print_r ( $tableau , TRUE );
$longueur = strlen ( $res ) — 10 ;
echo «New array :\n» . substr ( $res , 8 , $longueur ) . «\n» ;

Источник

array_sum

array_sum() возвращает сумму значений массива.

Список параметров

Возвращаемые значения

Возвращает сумму значений в виде целого числа или числа с плавающей точкой; 0 , если array пуст.

Примеры

Пример #1 Пример использования array_sum()

$a = array( 2 , 4 , 6 , 8 );
echo «sum(a) color: #007700″>. array_sum ( $a ) . «\n» ;

$b = array( «a» => 1.2 , «b» => 2.3 , «c» => 3.4 );
echo «sum(b) color: #007700″>. array_sum ( $b ) . «\n» ;
?>

Результат выполнения данного примера:

User Contributed Notes 6 notes

If you want to calculate the sum in multi-dimensional arrays:

function array_multisum (array $arr ): float $sum = array_sum ( $arr );
foreach( $arr as $child ) $sum += is_array ( $child ) ? array_multisum ( $child ) : 0 ;
>
return $sum ;
>
?>

Example:

echo array_multisum ( $data );

Notably the function converts strings to float and ignores strings if they are not convertable:

$a = array( «String» , 2 , 4 , 6 , 8 );
echo «sum(a) keyword»>. array_sum ( $a ) . «\n» ;

$b = array( «12.3456» , 2 , 4 , 6 , 8 );
echo «sum(b) keyword»>. array_sum ( $b ) . «\n» ;
?>

sum(a) = 20
sum(b) = 32.3456

If you have a case where your array has int in strings, it sums them up as if there were only int in the array!
function sum_mix($a)
return array_sum($a);
>
var_dump(sum_mix([9, 3, ‘7’, ‘3’]));
Response will be int(22)

array_sum() doesn’t «ignore strings if they are not convertible», it converts them to zero. array_product() does the same thing, where the difference between «ignoring» and «converting to zero» is much more obvious.

//you can also sum multidimentional arrays like this;

function arraymultisum (array $arr ) $sum = null ;

foreach( $arr as $child ) $sum += is_array ( $child ) ? arraymultisum ( $child ): $child ;
>
return $sum ;
>

echo arraymultisum (array( 1 , 4 , 5 ,[ 1 , 5 , 8 ,[ 4 , 5 , 7 ]]));

array_sum converts strings to integer and array_sum(2,’2′) returns 4.

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